Tried posting on the technical support WoW forum and have received no responses. I'm posting here in the hopes of better luck.
I am having constant issues with crashes any time I go into a BG, Arena, Scenario, or Instance. They happen in bursts, one moment I could be fine doing a bunch of whatever. The next I'm DCing or crashing. And once it starts, it doesn't stop for hours. And to make it worse, almost every time this happens when I log back in I have deserter debuff and am kicked out of whatever I was doing. This started with MoP and has been getting progressively worse. Now it's starting to happen with just hearthing.
I've done google searches for similar issues, the main solution I find is a vid card not being supported, but I've checked and my card is supported and I updated the driver just to be sure.
Which version of Direct X are you currently running? Some video cards are having issues with the latest version, and we're seeing reports that if a person downgrades to DX9 that may resolve the issue. Feel free to PM me as needed.
Sounds kind of like what was happening to a few raiders in my guild last night. Only difference is they wouldn't dc when running into an instance, but they would dc whenever they were resurrected in raid.
hmm - if it's still happening, it might not hurt to send in your diagnostics with the report of how you swapped back to DX9. Once you have those submitted in a ticket, please PM me and I'll be happy to also take a look.