I too am having problems with 4.12.3, altho they are a bit different from reible's. The biggest nuisance I have noticed is my incomplete file list, half the files are red and not showing any uploads, hits or locations like the rest. I go to hit resume, and nothing changes. It has happened before with previous versions. I have my days set to 99, is there some kind of limit to the number of days as in a single digit? I also find that the program will drop connection after running for 30 mins or so. Other than that headache, LW is a great program. I ran others before, but nothing compares to this P2P.