Arrived at the office, turned on my desktop computer. Starts (in that order) mIRC, MSN, Thunderbird and Firefox. And boom, the keyword.URL pref is back to Microsoft Bing search engine...

Congratualtions Microsoft, you just lost one user : I have permanently removed your software from my computer and will remove all occurences of MSN Messenger from all my other machines, Windows or Mac. Well done.

Update: OOOOOH and this big piece of shit (sorry but I am fed up with Microsoft here) changed my Firefox Home Page to MSN without asking and without warning ; I made sure I denied that request when I installed MSN. Micorsoft, you deeply suck here.Don't wonder why I moved to Mac and Mac OS X ?