Powerpoint
Microsoft warned of a zero-day exploit that had been found in Powerpoint. The warning follows a zero-day found in Excel a month ago. McAfee's Avert Labs has a good analysis of the exploit here.
Porn
There were red faces all around at the UK's Home Office after its web site was found to be linking to a Japanese porn site. The original site that it linked to had become defunct, and it was purchased by the porn firm, said a spokesperson.
Twitter
This week was another bad one for Twitter. It experienced a swathe of cross-site scripting attacks that began with a worm that infected user profiles, causing them to post Twitter messages promoting a site called StalkDaily.com. Then, a message claiming to disinfect Twitter pages turned out to be yet another worm.
Miscellaneous
Three realtors were accused of illegally accessing another's hotmail account.
Conficker finally kicked in and began downloading rogue antivirus software to victims' machines. Other rogueware scammers take a more direct approach.
Julie Christie is the latest celebrity to join in support of Gary McKinnon.
Security vendors are selling technology to fake databases in a bid to protect against data theft.