Have been having an issue recently that has had some major implications on raid performance. Occasionally, I can't use my cool-downs!!! I'm in the middle of a fight and starfall comes off cd. I hit the hot-key and continue to dps but nothing happens. Assuming I just had terrible timing for my spell queue, I hit it again, nothing. I stop everything that I am doing and alternate between hitting the hot key and clicking the ability at least 8 times (watching the button depress) at approximately 1gcd time intervals. Nothing. This has happened for other abilities as well as for on use item procs. It has happened on other toons as well.

This issue has occurred regardless of my custom latency settings (it also happened before this feature came in, but not before 4.0 patch). Typical lat for me is a stable low 200's without a tunneling service.

This issue occurs on other characters. My mage has had issues blinking. The ability came off CD and i must have hit the hot-key and/or mouse clicked the ability at least 20 times over about 10gcd's and nothing happened. I mean literally stop, stand still, click blink a few times, wait a few gcd's click/hot-key blink a few times, nothing.

I can not figure it out, it is driving me insane.

I run a G19 + Razer naga.

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