Dunno how many others have experienced this bug, but I've had the bug where after you accept a leve, it doesn't show up in your log unless you re-log. This has happened to me a couple of times. I didn't lose anything - just the minor annoyance of having to relog to have the leves actually show up in the quest log (can't select them for synthesis either until re-log).
I've also had the bug where all of a sudden, I can't perform any actions on an engaged mob unless I go back to passive mode and then back to active.
Hopefully they'll iron out a few of these bugs.