Tested on:
windows 7
geforce gtx 660 ti
Also tested:
windows 7
geforce gtx 670
Broken: Blender 2.73a official
Animated image textures in cycles material viewport mode are buggy and extremely finicky to the point of being almost unusable.
Here's a zip with a .blend and 5 clearly numbered images to demonstrate:
{F139854}
There are multiple problems, and they may originate from the same bug. Here's what I've found so far:
-Pressing play does not update the image, only scrubbing the timeline or alt-scroll up/down affects it.
-Repeatedly scrubbing the timeline from frame 0 to frame 5 will eventually cause a permanent pink image in the viewport.
-Using alt-scroll up/down in the viewport will often show the incorrect image. For example, sometimes going to the previous frame will show the next frame's image. (Viewport not being redrawn after frame change?)