My wallet generated (mined) two transactions last night but it says "unconfirmed -1 of 4 confirmations, generated but not accepted".
how often does this happen? my coins have been in my wallet for around a month and this is the first time seeing it happen. do I avoid locking my computer? or is it just unavoidable?
Lol! This is perfectly normal. You just mined an orphan block. It happens every day to me. As i said, perfectly normal.