I opened the following crash report with OpenEye and it said that the mods involved included the Malisis mods and Hardcore Ender Expansion. If you could take a look at it that'd be appreciated.

http://pastebin.com/K8JPmNdD

No idea what Malisis Doors is doing, but it looks like they're doing it wrong. Report to them first, if the dev thinks it's HEE's fault, send them a link to this issue, let them explain what's going on and I'll reopen the issue.

It is indeed an issue on my side that will be fixed in the next update.