Yeh, before doing any kind of movement, be it hitting, casting, or walking, would completely break the hide. not just break it against the single mob hit, as far as i'm aware(don't play taos).
I can replicate the lighting issue, pretty much every time I open mail, go to send and choose a recipient, while the recipient drop down is open, the lighting layer will cover everything, until closing the list again.(This has at least worked every time I've tried the mail outside of a sz)
I have also had some weird issues today. I hit and it froze on the last frame of the hit for about 10 seconds every time, others couldnt see me hitting at all(nothing to do with lag or weight or anything like that, logging fixed this)
Also, though Thrusting was turned on, every so often it wasn't doing it, tried turning it on and off multiple times, and it wouldn't work SOME of the time. This then started happening with my HalfMoon also.