Lately I've had some nasty bugs. I can still play the game, but several addons stop working. Most noticable are Pitbull and Quartz. I won't see any information anymore on the unitframes and quartz sort of locks. Sometimes Quartz doesnt lock completely but the autoshot/swing timer just keeps going even if I'm not shooting. My actionbar addon (Macaroon) also gives some strange behaviour then.
I can still play the game to some extent and I've finished off bossfights in this bugged interface. When I try to get a game menu (pressing Esc) it doesnt work. When I try alt-tabbing my computer bugs out completely and finishes with a BSOD, forcing me to reboot.
Last night while leveling in Howling Fjord I encountered this behaviour again and took screenshots of the Bugsack errorwindow with the errors of that moment:
the bugged interface:
I've targetted my pet (the upper right unitframe). Pitbull is also showing my targetoftarget unitframe, although there's no target of target. Furthermore Quartz is bugged out and keeps looking like this all the time. Cowtip looks good though, it leaves when not mousing over something.
the errors (error #17 is split into 2 frames):
and my addonslist (if it is of any use)
I hope anyone can help, fix or do whatever to get these bugs away.
(I'll also post this bugreport in another forum for the author of Macaroon)
Have you tried disabling all of your AddOns, then enabling one, logging, check for errors, then enable another?
I would do that first. That is one, usually accurate way to zero in on a problem AddOn. From the looks of things, it appears that Macaroon! is the one with serious issues. You can try to log in with only Macaroon! enabled to see if any errors are thrown. Same thing with Quartz and Pitbull.
Regarding your PC BSODing on you due to AddOns, that is the first time I have ever heard of that. I think you may have another issue on your machine besides WoW AddOns that is causing the BSOD. Graphics drivers could be causing such issues as can bad RAM.
From the looks of things, it appears that Macaroon! is the one with serious issues. You can try to log in with only Macaroon! enabled to see if any errors are thrown.
I've been using Macaroon for months, and it's never generated a single error.
In agreement with Arrowmaster's comment, I'd bet you CowTip is the source of the OP's problem. There's an old thread (locked now, I think) on these forums with pages and pages of people getting the same "block too big" memory allocation error while using CowTip.