Package: libapache-mod-php4 Version: 4:4.3.10-15 The default for session.gc_probability was changed from the upstream default of 1 (garbage collection runs on 1% of requests) to 0 (no garbage collection). I believe that the reason for the change was the bug #267720 <http://bugs.debian.org/267720>. Unfortunately, this breaks things for people using session_set_save_handler() function to set their own session management (for example to record sessions in a database). If existing codebase is using custom garbage collection function an upgrade to Debian silently stops the garbage collection from happening, since the cron job from php4-common only cleans up default session temp files. Also this changes the expected (documented on www.php.net) behaviour of php session handling. The solution for this would be to either 1. Re-enable the gc_probability and change default ownership and permissions on /var/lib/php4 to allow www-data deleting files from it (and disallow regular users any access, something like chmod 770 ) 2. Leave this as it is, but bring up a warning message in the package post-config to bring this to the user's attention
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