I got an Exception for you!
at java.lang.Thread.run(Unknown Source)
Guess why it happened. Right, a certain GUI tried to read Texture/Name for a Solarpanel-ItemStack with MetaValue -1. Why would that happen you ask? Maybe because I made my Sorter now even working with Wildcard Damage Values. Please add range checks to all your Array-Calls for ItemNames and Textures.
Note that, I will add a crashpreventing test for anything what tries to get wildcard-valued, as even Redpower crashes due to that, and you know how slow Eloraam is at fixing Bugs.