Forum Server errors
 

Just checked my error log and there are thousends of errors like that:

Code:
[Mon Apr 12 17:36:18 2010] [error] [client 78.86.150.69] FastCGI: server "/usr/local/apache/fcgi-bin/php5-fcgi" stderr: ALERT - script tried to increase memory_limit to 134217728 bytes which is above the allowed value (attacker '78.86.150.69', file '/home/angliki/ftp/forum/includes/class_image.php', line 65)
Basically this error shows up every few seconds.

Any ideas why is it happening?