And me too, but only for one contact. It's not free space issue. I have 12Mb/800Mb/>1Gb on root/home/MyDocs and can install new apps without any problems. I can assume that this can be caused by some smileys which are similar to sql syntax or by renaming the contact. Or by extending it's data with some non-typical information. Or by some conversations addons: I have Skype, GoogleTalk, ICQ, Ovi and Vkontakte (russian [anti]social network, clone of facebook that enabled jabber for all users) accounts activated at least once. Another symptom is that for this contact statuses of new messages cannot be updated: I can see notification that sms was delivered, but in conversation window it's still can be seen as awaiting to be sent. Will try to see .db