Hi, I'd recently updated php, mysql, and php-apache packages to following versions: php 5.3.1-4 mysql 5.1.43-1 php-apache 5.3.1-4 After update my existing webapps started showing error: Unable to connect to database, with nothing changed on the webapps side. After assuming that recent update cause them to break, I downgraded all related packages, and then upgraded them one-by-one. Following is the final combination which worked for me: php 5.3.1-4 mysql 5.1.43-1 php-apache 5.3.1-3 If anyone also exhibits this behaviour, then I can report this as bug. Thanks Ashish SHUKLA -- They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety. -- Benjamin Franklin, Memoirs of the life and writings of Benjamin Franklin