As I may have fixed the problem I thought I would report how I (may have) fixed it. While I am still completely unsure HOW it happens I believe it may be becoming spawned into the game (unnaturally) and this happening is causing a bug where the game thinks the block is there and active, but it is not...
Anyway, the way I fixed it was I made the block number given to it by IDResolver to the same number the config has given it. When I reopened the save game (the latest one that was crashing) I was placed back at my spawn and my inventory was empty, but I could proceed beyond the location that crashed the game.
So, yeah, while I still have no idea what exactly was causing the issue (perhaps the mod expecting the block to be identified as one number and the actual block being identified as another?) I was (I believe) able to resolve the issue.
By the way, the way I thought of this was because of this thread: http://forum.industrial-craft.…age=Thread&threadID=6459& so, thank you for the information.