I noticed every time I login, there's some sort of bug that has to do with fighting/stamina.
1. Sometimes when I login (I always fight that rogue on the way to Akkaio) and fight that rogue, he does barely any damage every time I fight him, or sometimes he does damage every hit. Just a few minutes ago when I logged in, he killed me in less than a minute and I had full health (my character isn't weak, either).
2. When running, sometimes my stamina loves to deplete itself really quickly, or it'll act normal and actually count by the numbers instead of zip down to 0 in 2 minutes. Even when I'm not moving it's going to drain itself all the way to 0, which is very annoying.
3. My hit rate. Seems sometimes I hit high, and other times I can't hit at all (really, my character totally stops attacking and I need to redo the stance to get it to work), or most of my attacks just get blocked instead of my character trying to stop fighting back.
EDIT: Oh, and the one and only most annoying bug EVER, is me being too tired to attack, with bloody stance, when I have 90% of my stamina left. >.>