Yes, I've been getting those errors as well.
I have set
/swatter noauto
which prevents a box from popping up.
I actually debugged and diagnosed this bug last October, here:
http://www.wowinterface.com/forums/s...ad.php?t=44964
As noted in that thread, the line in question that's generating the error (nUI_UnitAura.lua: 326) is writing to a property that is never read anywhere, and has no effect on the behavior of anything, so it should simply be commented out or deleted.
I did this to my private copy of nUI_UnitAura.lua for a while, and as I reported in the link above, it eliminated the errors with no other side effects, but I got tired of having to hack it back in whenever I installed a new version...
