Since I have been running into these bugs as well, and AMD isn't forthcoming about when / if they have fixed anything, nor have they released any BETA drivers for awhile, it is nice to have a tally of the current state of the openGL drivers, so when people wonder why something doesn't work, it may not be your code, but it could very well be driver bugs instead.
All this if from http://www.g-truc.net/post-0655.htm
This table shows the current status from all the vendors.
Basically, it seems if you are serious about openGL, and want the least amount of driver bugs, then your only choice is to use Nvidia gear.
The full breakdown is available here: http://www.g-truc.net/doc/OpenGL%20status%202014-05.pdf