What Addon is this?

[Everglow]

Anyone have any idea what addon is putting this text up in the middle of the screen?

http://i285.photobucket.com/albums/ll42/EverglowSoE/whataddon.jpg

[mender of bad soles]

looks like it's a combat log, so try attacking somthing to see what happens.....

Mod could be somthing like simplecombatlog etc.

[ChaosInc]

Definitely a combat log of some sort. Honestly, there are too many out there to pinpoint a definite source with a display that simple.

[Everglow]

Ya... it's a real pain in the neck. It can be just about anything in my combat log, and it happens randomly. I might go a couple hours without seeing it, then it suddenly happens three times in a minute. It's going to take forever to find the culprit :(

A hex upon whatever mod author thought anyone would want to see that big ugly box in the middle of their screen.

[Tunga]

List your mods and we might be able to narrow it down.

[HonorGoG]

I agree with Tunga, please list your addons and also grab a screenshot each time it happens and post a link. This will show us if it's an event specific trigger. Looking at your picture, I know it's not the core Titan package doing that.