Since updating to 2.8, when attempting to craft something even as simple as a crafting table, the game will crash and will throw the below error. Reverting to 2.7 resolved this issue.

Minecraft 1.7.10
Forge 10.13.4.1492
Power Converters 2.8

Crash Report: http://pastebin.com/ZPPSNbmQ

(I would also include the full forge log, but it's too big for pastebin...it keeps killing the page when I paste it in).

that may be my bad, on a player joining i send all recipes from the server to the client, it may be messing with that.

Hmm, i can craft stuff in singleplayer.. set them to false for now and ill test it in smp.

Confirmed in 2.9 that setting the new config setting to false fixes the issue. Still crashes if set to true, which I assume is expected? (it also defaults to true i noticed).

The crash was happening in both Singleplayer and SMP for me. Most of my troubleshooting has been done in Singleplayer, but the problem started on SMP.

I can send you my mod list if it helps.

Nah mod list dosent matter, it is to do with the way i remove and add recipes while the game is running, i need to figure out a way of doing it without creating null data in the recipe map.