Questing Glitch?

[mnoodle]

Whenever I pick up a quest or turn one in I experience a 2 to 5 sec pause in gameplay. In addition if I kill a mob associated with a quest it will usually pause on my as well after the kill. Has there been any others with this problem? I am not sure if it has anything to do with nUI or addons not playing nicely with it or simply a different addon causing it. Any suggestions or similar encounters? I have a host of addons, questhelper, questguru, cartographer are the ones most involved in the questing process. Thanks!