nope, I wonder if there was an update I missed

It's an issues with the way alphas render on top of alphas, it's a known issue on SL's end. You can message support, but they will tell you the same thing. They have a jira open about it.

This is a problem with all semi transparent textures in any openGL rendering engine. It's not LL's issue alone. We have a way around it in SL which isn't ideal because it forces one texture to ignore the alpha

channel. Zooming in and out with your mouse can force the textures to render in teh right order, but it's temporary