I have an interesting problem with my WoW. I use GMail and as such I use the GMail Notifier to alert me when I have new emails. I also play in windowed mode. From time to time I'll have an issue where my WoW goes from running nicely to very sluggish. The first sign that this is happening is that whenever I get an alert that I have a new email the Notifier's Tray Alert Thingy (NTAT!) will get stuck. It will come up over WoW, causing my FPS to drop from 60ish down to 2, and it won't go away until I tab out of WoW. If I move my mouse down to my taskbar long enough for the little tooltip to come up telling me what window I'm hovering over, my framerate drops down to 2.

This happens without warning.

This has happened to me about 3 times now, and now I think I know how to fix it. The first time it happened I just lived with it until I had to reinstall WoW and forgot to save all my settings. The second time it happened I lived with it until I decided that I wanted to start all over with my UI and deleted my Interface/WTF folders. Then I started WoW, happened to get an email and not lag horribly. So I figured there was something in my WTF folder that was the culprit.

Five days ago I began to experience the issue again. x.X This time I made backups of everything and deleted all of my addons and everything under the "Account" folder inside the WTF folder (World of Warcraft\WTF\Account) and then began downloading the latest version of all my mods. While I was doing this I started WoW to see if the issue was fixed. It was not. So I went through to see if I had missed anything and thats when I saw the config.wtf file in my WTF folder. I deleted that and then started WoW again and...Problem solved. Then just out of curiousity and the desire to be certain, I restored my backups, minus config.wtf, started WoW and...no issue. So I guess I'll just be deleting that file if this ever happens again and just restoring all my settings manually.