On some versions of uTorrent (notably 1.7.6), it seems that the UI can remotably be crashed and will stay crashed even if you update your version to 1.7.7.
Hopefully there's a way to fix it without losing all the torrents that you're seeding.
1st - Update your utorrent to 1.7.7 (http://www.utorrent.com/download.php)
2nd - Close uTorrent and go to your C:\Documents and Settings\YourUserName\Application Data\uTorrent folder and remove all the settings.dat/old/bad files. Note that you will lose all your settings by doing so.
3nd - Restart uTorrent and reconfigure it