I have little hope that this will be answered by it's original author, as he's taken something of an extended break from the game, I am guessing, but since the last patch, the following has been happening with this the unitframe addon
oUF_Metzerott:
See the "fishtails" on the bar textures? They're not being stretched properly or something. I'm not much at coding myself, and wouldn't have the slightest idea what the new patch broke or where to look in order to fix it.
Actually, come to think of it, these strange texture stretching issues also seem to be plaguing other addons, such as
hud.
Anyone want to lend a hand here?