Same for me

.
Tp'ing stops working at best, worst it hangs or fails and the only solution is relogging.
Changing clothes results in "pending attachment for this spot" about 1/3rd of the time to the point where I simply stopped changing accessories/hair/shoes during busy hours.
Rezzing anything frequently fails, or it takes up to 5 minutes before the prim(s) actually appear, same with taking to inventory.
Group IMs aren't received, IMs go to offline (happens during normal times as well, it's just far more rare), main chat shows out of order.
Logging in results in being invisible with no balance (happens regardless of grid attacks) until after about 5 minutes it finally comes through
Some textures refuse (including on clothing) to rez all the way and remain stuck at the blurry stage
Some prims refuse to rez no matter how much time passes (rather frustrating when trying to do a couple dance at a club)
Standing up or sitting down infrequently puts me at -200, when standing up whatever I was sitting on has a tendency to either catapult into the air or get stuck underground (but only on my screen, rightclicking it - assuming I can find it - puts it back where it's supposed to be)
Watching others sit they rotate in place first, then start the animation, and only 10 seconds later actually move to where the pose ball is located, watching them stand up makes them vanish for 5-10 seconds
Uploads can result in pictures that work fine for me, but when passed on to someone else they get missing from database
I'm sure I'm missing a lot of other things, but none of the above (with one or two exceptions) ever happens when there's a low load during the off-hours.
[Edited to add that none of this would actually bother me (well, less at least

) if they at least acknowledged that there are significant problems with load and they're working on/thinking up a solution]