Issues with other avatars' appearances in world

Before 1.12 came out, there used to be an issue where some avatars' appearances would explode out or proportion when they were meant to appear as short people/creatures/things.
After 1.12 came out, this "ruthing" issue seems to have vanished, but I'm having a new problem with viewing avatars. While locally everything looks fine, other users who have multiple attached prims on their heads (chin, nose, mouth, ears) look completely hideous.
(In the attached image) The one on the left certainly isn't supposed to look like that, the one on the right's head is supposed to be narrow and recessed into the head. Instead, the head is round, bulbous, and extremely bug-eyed, so much so that the "human eyes" weren't even attached to the head.

I have cleared my cache, as a matter of fact, both images there are from a fresh reinstall of Second Life and it was the first time I'd seen either of them in-world. I didn't have room for a third shot before my client went down abruptly, but the third was a similar build to the left, before I had reinstalled the client, which had the exact same problem.

I can say that it's not just localized with myself, a friend mentioned there was something wrong with the glasses on my own avatar when they looked fine to me. One brand of avatars still does this with other users due to multiple attach points for their various head-parts.

In a nutshell, I'm curious, what could be causing this? I'm grateful the one "ruthing" problem has been solved, but it's been replaced with a new, slightly less pleasant one.

Thx Thornne--I've seen similar things before but they haven't been easily reproducible. Aggregated this to my queue to be on the lookout for should more weirdness like this happen. I also hope you have your graphics card drivers updated.

If you find a firm, step-by-step way to make this happen over and over, don't hesitate to send a bug report via Help menu and email me (torley@lindenlab.com) the # so I can coordinate with the eXtreme Bug Hunters about it.

I'm also moving this thread to Technical Issues. Anyone else doing this, please show your pictures and share your info.

(Can't post attachments in the technical issues forum. ;_

I just had another problem with a person's avatar head exploding. Every issue with the head mutation, it seems to revert to the same shape. Rounded head, eyes exploded out of sockets.
This time, it was after I had left Second Life running for a few hours, and the user had changed body shapes in front of me. Her client crashed and she reconnected. Her head shape had reverted to what it should be. It can't be a cache issue now, or else it would be persistant.

If one thing seems persistant, this happens when users are changing shape or have been online earlier and arrive while I'm task-swapped out.

I've had issues where if I'm teleporting (while full-screened) and task swapped out of SL, when I come back, I've been set to the "Default female" shape and body shortly before the client crashes out. Possibly an issue with rendering code? Or moreso memory handling?

While I typed this, someone came online with the exact same problem as was had before. Her avatar looks fine locally, though.

Steps to reproduce the bug:Alt-tab out of Second Life, windowed or fullscreen, allow people with short avatars to arrive or short avatars with multiple head attachments to arrive

Observed results: When regaining focus, shorter users body shapes appear disfigured. Eyes bulge out of heads, necks become unordinarily long, heads themselves become big and round, hair, head attachments, etc, all appear in the wrong locations. Locally, this happens if I change focus while in the middle of teleporting. Once regaining focus (after landing), my body shape will have reverted to a skinny female shape, followed by SL crashing.

Expected results: None of the above listed in observed results. Focus should not affect how avatar data is recieved?