New problem: The client is starting up okay now that I've deleted the old blockchain files. Unfortunately, now it always gets stuck at 4 days behind. I've tried resyncing and clearing out the previously cached blockchain a few times but even after hours it still gets stuck at 4 days behind.
A couple of people have reported that problem, but it's strange for it to happen on a Linux OS, or are you now using Windows? I think the only way to solve it is to do a fresh resync again. Try syncing with cryptonited instead of Qt and see how that works. I recently started experiencing some syncing problems with Qt on my Windows machine, which is strange because I haven't had any issues until now. I did upgrade my .NET framework a few days ago so I could install VS 2012 and I highly suspect that has something to do with it, which is why the problems only seems to occur on a fraction of Windows machines.