Robert_Charlton - 8:56 pm on Dec 15, 2010 (gmt 0)
With regard to reported Outlook problems, I use Office 2003 and don't use Outlook, so I can't comment from personal experience.
I do see via Google Realtime Search, though, that KB2412171 is implicated, and some people are suggesting that uninstalling it fixes the problem. I won't make that recommendation, because I haven't tried it, but here are searches (on Realtime) you can try...
outlook 2007 KB2412171
Also, this apparently affects Outlook 2007 in combination with Gmail.
Some results from Germany as well as from the US. Microsoft apparently doesn't monitor Twitter, so @MSDownloads hasn't commented. ;)