Like older 2.1 beta versions, the current one appears to have a timing problem.

Yesterday, I targeted the auction 220596730917 (ebay UK) with time offset 3 s. Jbidwatcher sniped successfully, filed the auction under “bought”, but was 15 s early (see ; mine was the bid for £4.78). My spouse reported the same problem against pre4 a lot, with offsets both positive and negative up to 30 s.