This could cause a massive annoyance, especially if you do it to your friends, their account will become useless! Anyone interested in the code, here it is:
If you were stupid enough to insert that into your personal message, here are the instructions to fix it, as provided by Jonathan Kay:
If you've done this, do the following (applies to Windows Live Messenger 8.1) ...
On XP:
Sign out of Messenger. Click Start, then Run, type:
%userprofile%local settingsapplication datamicrosoftwindows live contacts
and click OK. Right-click the e-mail folder corresponding to your email, and choose Delete. Then sign back into Messenger.
On Vista:
Sign out of Messenger. Click Start, type:
%appdata%..localapplication datamicrosoftwindows live contacts
and click OK. Right-click the e-mail folder corresponding to your email, and choose Delete. Then sign back into Messenger.
Use it how you like, I just want the Messenger team to take this post into account. People could turn something like this into an extremely annoying practical joke.
Update: I've changed the code into an image, it stopped our RSS feed from rendering correctly. Jonathan Kay has provided me with more information about the issue, as I knew little about the problem:
It has nothing to do with roaming and doesn't even get to the server. The server simply rejects the PSM and signs you out. Since the PSM is stored locally, it will keep trying to set this every time you sign in. Hence why removing the data where the PSM is stored solves the problem.
You could sign on another machine or Windows user account and it would be fine.
For information about the bug including a screenshot and how to replicate it look at their news post or forums.
It may not be a major bug but you've got to say that it's still wierd.
Messenger Stuff