Since the 2.4 patch, I have had a problem with lockups or DC's when I attempt to hearth or port from the new Isle zone back to Outlands. When I disabled all my mods, the problem went away. After experimenting a bit to narrow down which addon was causing the problem, I found that the problem only occurs when I have Gatherer turned on. I am currently running the latest (3.1 released 3/26/08) available for download and the problem is still occurring. I also went and checked the Blizz bug forum and found that I am not alone in my problem or findings. Below is a link to a thread showing other people with the same problem and reaching the same conclusion for cause.

http://forums.worldofwarcraft.com/thread.html?topicId=5575607955&sid=1

Link to original post on our forums: http://forums.norganna.org/discussion/6753/gatherer-causing-freezing-when-hearthing-or-porting-from-isle-to-shatt/