Perhaps not "simple" but...
I've been having seemingly random crashes lately in 1.6.4 (modded, of course!) due to a "Ticking memory connection -- java.lang.IndexOutOfBoundsException: Index: 41, Size: 0" or indices and sizes to that effect. It's also corrupted my world once. I'm not exactly sure what's causing it. I have looked on various places online, including here and MCForums, but nobody has found a solution yet.
I don't want to start a discussion here, so if anybody has any information for me or wants me to explain further (crashlog, modlist etc.), could you PM me please? Thanks in advance.
EDIT: If this should go in the Tech Support forum, then sorry, I didn't know...
Humour me a second, do you have any wireless redstone stuff ChickenBones version) placed?