Does the N900 use telepathy? I have this problem on my N800, which uses telepathy, and have been watching to see if other telepathy-based systems are experiencing this. There may be a fix in something called Telepathy PPA.

http://ubuntuforums.org/showthread.php?t=1594248

http://www.mail-archive.com/desktop-...msg555450.html

http://rodrigoguarischi.wordpress.co...-dont-connect/