mysql-server-5.1 installation problems

[Erez Zarum <erez@icinga.org.il>]

After upgrading the mysql-server-5.1 (5.1.49) i'm having problems with 
apt-get trying to run invoke-rc.d:

Setting up mysql-server-5.1 (5.1.49-1~bpo50+1) ...
Stopping MySQL database server: mysqld.
Starting MySQL database server: mysqld ..
invoke-rc.d: initscript mysql, action "start" failed.
dpkg: error processing mysql-server-5.1 (--configure):
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 mysql-server-5.1
E: Sub-process /usr/bin/dpkg returned an error code (1)

although it fails, the server runs, then evertime i use apt-get i keep 
getting a server restart, anything i can do about it?

Erez.