Hi tshif:
May be here is a clue.
There are 12 Packages have been updated than before and some packages belong to CentOS 5.3 when I run ./piaf-hylafax.sh as of April 1.
Part of the installation as below:
Dependencies Resolved
=============================================================================
Package Arch Version Repository Size
=============================================================================
Installing:
ImageMagick-devel i386 6.2.8.0-4.el5_1.1 base 75 k
expect i386 5.43.0-5.1 base 158 k
giflib i386 4.1.3-7.1.el5.1 base 39 k
netpbm-progs i386 10.35-6.1.el5_3.1 updates 2.0 M
php-pear-MDB2-Driver-mysql noarch 1.4.1-3.el5.centos extras 41 k
php-pear-Mail noarch 1.1.14-1.el5.centos extras 26 k
php-pear-Mail-Mime noarch 1.4.0-1.el5.centos extras 39 k
php-pecl-Fileinfo i386 1.0.4-3.el5.centos extras 11 k
Updating:
lcms i386 1.18-0.1.beta1.el5_3.2 updates 176 k
libpng i386 2:1.2.10-7.1.el5_3.2 updates 241 k
mesa-libGL i386 6.5.1-7.7.el5 base 9.7 M
php i386 5.1.6-23.2.el5_3 updates 1.1 M
php-cli i386 5.1.6-23.2.el5_3 updates 2.1 M
php-common i386 5.1.6-23.2.el5_3 updates 151 k
php-mbstring i386 5.1.6-23.2.el5_3 updates 994 k
php-mysql i386 5.1.6-23.2.el5_3 updates 85 k
sudo i386 1.6.9p17-3.el5_3.1 updates 217 k
vixie-cron i386 4:4.1-76.el5 base 78 k
Installing for dependencies:
ImageMagick i386 6.2.8.0-4.el5_1.1 base 3.3 M
bzip2-devel i386 1.0.3-4.el5_2 base 38 k
ghostscript-devel i386 8.15.2-9.4.el5_3.4 updates 40 k
lcms-devel i386 1.18-0.1.beta1.el5_3.2 updates 156 k
libICE-devel i386 1.0.1-2.1 base 13 k
libSM-devel i386 1.0.1-3.1 base 9.4 k
libX11-devel i386 1.0.3-9.el5 base 666 k
libXau-devel i386 1.0.1-3.1 base 11 k
libXdmcp-devel i386 1.0.1-2.1 base 7.5 k
libXext-devel i386 1.0.1-2.1 base 57 k
libXt-devel i386 1.0.2-3.1.fc6 base 332 k
libcroco i386 0.6.1-2.1 base 127 k
libgsf i386 1.14.1-6.1 base 116 k
libjpeg-devel i386 6b-37 base 105 k
librsvg2 i386 2.16.1-1.el5 base 178 k
libwmf i386 0.2.8.4-10.1 base 821 k
mesa-libGL-devel i386 6.5.1-7.7.el5 base 466 k
netpbm i386 10.35-6.1.el5_3.1 updates 141 k
php-pear-Auth-SASL noarch 1.0.2-4.el5.centos extras 11 k
php-pear-MDB2 noarch 2.4.1-2.el5.centos extras 132 k
php-pear-Net-SMTP noarch 1.2.10-1.el5.centos extras 18 k
php-pear-Net-Socket noarch 1.0.8-1.el5.centos extras 12 k
tcl i386 8.4.13-3.fc6 base 961 k
xorg-x11-proto-devel i386 7.1-9.el5.centos base 253 k
Updating for dependencies:
php-gd i386 5.1.6-23.2.el5_3 updates 116 k
php-pdo i386 5.1.6-23.2.el5_3 updates 64 k
Transaction Summary
=============================================================================
Install 32 Package(s)
Update 12 Package(s)
Remove 0 Package(s)
Total download size: 25 M
Downloading Packages:
(1/44): libXext-devel-1.0 100% |=========================| 57 kB 00:00
(2/44): libSM-devel-1.0.1 100% |=========================| 9.4 kB 00:00
http://ftp.twaren.net/Linux/CentOS/...ghostscript-devel-8.15.2-9.4.el5_3.4.i386.rpm: [Errno 14] HTTP Error 404: Not Found
Trying other mirror.
(3/44): ghostscript-devel 100% |=========================| 40 kB 00:00
(4/44): vixie-cron-4.1-76 100% |=========================| 78 kB 00:00
(5/44): libcroco-0.6.1-2. 100% |=========================| 127 kB 00:00
(6/44): libICE-devel-1.0. 100% |=========================| 13 kB 00:00
(7/44): ImageMagick-devel 100% |=========================| 75 kB 00:00
(8/44): tcl-8.4.13-3.fc6. 100% |=========================| 961 kB 00:05
(9/44): php-pear-Net-Sock 100% |=========================| 12 kB 00:00
(10/44): php-pear-Auth-SA 100% |=========================| 11 kB 00:00
(11/44): xorg-x11-proto-d 100% |=========================| 253 kB 00:01
(12/44): php-pear-Mail-Mi 100% |=========================| 39 kB 00:00
(13/44): sudo-1.6.9p17-3. 100% |=========================| 217 kB 00:01
(14/44): libpng-1.2.10-7. 100% |=========================| 241 kB 00:01
(15/44): mesa-libGL-6.5.1 100% |=========================| 9.7 MB 00:42
(16/44): netpbm-10.35-6.1 100% |=========================| 141 kB 00:00
(17/44): libwmf-0.2.8.4-1 100% |=========================| 821 kB 00:03
(18/44): php-gd-5.1.6-23. 100% |=========================| 116 kB 00:00
(19/44): php-pdo-5.1.6-23 100% |=========================| 64 kB 00:00
(20/44): netpbm-progs-10. 100% |=========================| 2.0 MB 00:08
(21/44): lcms-devel-1.18- 100% |=========================| 156 kB 00:00
(22/44): giflib-4.1.3-7.1 100% |=========================| 39 kB 00:00
(23/44): ImageMagick-6.2. 100% |=========================| 3.3 MB 00:14
(24/44): php-pecl-Fileinf 100% |=========================| 11 kB 00:00
(25/44): php-pear-MDB2-Dr 100% |=========================| 41 kB 00:00
(26/44): libXt-devel-1.0. 100% |=========================| 332 kB 00:01
(27/44): libjpeg-devel-6b 100% |=========================| 105 kB 00:00
(28/44): libXau-devel-1.0 100% |=========================| 11 kB 00:00
(29/44): php-mysql-5.1.6- 100% |=========================| 85 kB 00:00
(30/44): php-pear-MDB2-2. 100% |=========================| 132 kB 00:01
(31/44): expect-5.43.0-5. 100% |=========================| 158 kB 00:00
(32/44): php-common-5.1.6 100% |=========================| 151 kB 00:00
(33/44): php-pear-Net-SMT 100% |=========================| 18 kB 00:00
(34/44): bzip2-devel-1.0. 100% |=========================| 38 kB 00:00
(35/44): librsvg2-2.16.1- 100% |=========================| 178 kB 00:00
(36/44): lcms-1.18-0.1.be 100% |=========================| 176 kB 00:00
(37/44): mesa-libGL-devel 100% |=========================| 466 kB 00:02
(38/44): php-pear-Mail-1. 100% |=========================| 26 kB 00:00
(39/44): php-cli-5.1.6-23 100% |=========================| 2.1 MB 00:25
(40/44): php-5.1.6-23.2.e 100% |=========================| 968 kB 00:36
http://mirror.nus.edu.sg/centos/5.3/updates/i386/RPMS/php-5.1.6-23.2.el5_3.i386.rpm: [Errno 4] Socket Error: timed out
Trying other mirror.
http://ftp.yz.yamagata-u.ac.jp/pub/linux/centos/5.3/updates/i386/RPMS/php-5.1.6-23.2.el5_3.i386.rpm: [Errno 14] HTTP Error 404: Not Found
Trying other mirror.
http://ftp.isu.edu.tw/Linux/CentOS/5.3/updates/i386/RPMS/php-5.1.6-23.2.el5_3.i386.rpm: [Errno 14] HTTP Error 404: Not Found
Trying other mirror.
(40/44): php-5.1.6-23.2.e 100% |=========================| 1.1 MB 00:06
(41/44): libX11-devel-1.0 100% |=========================| 666 kB 00:02
(42/44): php-mbstring-5.1 100% |=========================| 994 kB 01:02
(43/44): libXdmcp-devel-1 100% |=========================| 7.5 kB 00:00
(44/44): libgsf-1.14.1-6. 100% |=========================| 116 kB 00:00
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Updating : libpng ####################### [ 1/56]
Updating : php-common ####################### [ 2/56]
Updating : lcms ####################### [ 3/56]
Updating : php-pdo ####################### [ 4/56]
Updating : mesa-libGL ####################### [ 5/56]
Installing: lcms-devel ####################### [ 6/56]
Updating : php-cli ####################### [ 7/56]
Updating : php ####################### [ 8/56]
Installing: php-pear-Auth-SASL ####################### [ 9/56]
Installing: libwmf ####################### [10/56]
Installing: ghostscript-devel ####################### [11/56]
Installing: libcroco ####################### [12/56]
Installing: tcl ####################### [13/56]
Installing: php-pear-Net-Socket ####################### [14/56]
Installing: php-pear-Net-SMTP ####################### [15/56]
Installing: netpbm ####################### [16/56]
Installing: libjpeg-devel ####################### [17/56]
Installing: libXau-devel ####################### [18/56]
Installing: php-pear-MDB2 ####################### [19/56]
Installing: bzip2-devel ####################### [20/56]
Installing: libgsf ####################### [21/56]
Installing: librsvg2 ####################### [22/56]
Installing: ImageMagick ####################### [23/56]
Installing: php-pear-MDB2-Driver-mysql ####################### [24/56]
Installing: netpbm-progs ####################### [25/56]
Installing: php-pear-Mail ####################### [26/56]
Installing: expect ####################### [27/56]
Updating : php-mysql ####################### [28/56]
Updating : php-mbstring ####################### [29/56]
Installing: php-pecl-Fileinfo ####################### [30/56]
Updating : php-gd ####################### [31/56]
Updating : vixie-cron ####################### [32/56]
Installing: php-pear-Mail-Mime ####################### [33/56]
Updating : sudo ####################### [34/56]
Installing: giflib ####################### [35/56]
Installing: xorg-x11-proto-devel ####################### [36/56]
Installing: libX11-devel ####################### [37/56]
Installing: libXext-devel ####################### [38/56]
Installing: libICE-devel ####################### [39/56]
Installing: libSM-devel ####################### [40/56]
Installing: libXt-devel ####################### [41/56]
Installing: libXdmcp-devel ####################### [42/56]
Installing: mesa-libGL-devel ####################### [43/56]
Installing: ImageMagick-devel ####################### [44/56]
Cleanup : php-mbstring ####################### [45/56]
Cleanup : php ####################### [46/56]
Cleanup : php-cli ####################### [47/56]
Cleanup : lcms ####################### [48/56]
Cleanup : php-common ####################### [49/56]
Cleanup : php-mysql ####################### [50/56]
Cleanup : php-pdo ####################### [51/56]
Cleanup : php-gd ####################### [52/56]
Cleanup : mesa-libGL ####################### [53/56]
Cleanup : libpng ####################### [54/56]
Cleanup : sudo ####################### [55/56]
Cleanup : vixie-cron ####################### [56/56]
Here's the fix from wardmundy
http://pbxinaflash.com/community/threads/centos-5-3-updates-safe.3962/#post-24084
chown asterisk:asterisk /var/lib/php/session
Run darmock's update-fixes also do the trick.
For your information only.