If you are having issues with your AE system after the latest update, i.e. receiving an internal server error, when you try to access it, please post your coordinates in the "Ask a moderator" thread.
There is a known bug that I believe is fixed in 1.5 with AE Storage buses, and GT Machines to fix this try Removing your storage buses from the following machines: Quantum chest, Industrial electrolyzer, Plate bending machine and Assembling machine, this may also extend to automatic machines however that's just speculation on my part as it seemed to fix itself after I removed the buses from mine You may need to pick up and replace your ME controller
http://skcraft.com/threads/how-to-fix-ae-crashing-in-new-update-solution.2176/#post-21913 Try this first, if neither cromy or soda's solutions work, post your coordinates under ask a moderator.