http://pastebin.com/ev0fFfAA
seems a problem with railcraft and dynamic surround, should I report to them too?

I don't see any casting issues in latest codebase. Are you running an older version of the mod?

EDIT:
Here's the exact bugged area in 3.3.6, the version you are running:

Update to 3.3.7 or 3.3.8 if you can and it should resolve itself.

ohw, sorry! yes my bad, I should have look more accurately, I will update the mod soon, I feel bad to have reported this before to try with the latest update :/ sorry