A newly discovered format string error in ICQ version 6 build 6043 once again highlights the need to be cautious about who you are conversing with. Interaction  with the embedded Internet Explorer component can allow specially crafted messages to execute arbitrary code on the affected system. Make sure that you only open messages from known and trusted contacts.  It is a good idea to clean unknown or untrusted contacts from your contact list and enable the “Accept messages only from contacts” option. The build named above is known to be vulnerable other versions may also be affected