From the MCF thread:

I ran into an odd little problem. I am unable to get the tooltip for allowed materials when I look at my patterns.

The other tooltips or materials and stats of completed tools however still work.

Just tried that and it still didn't work. Then I removed everything but TC, TiC tooltips and iguanatweaks and it works again. I'm going to add my mods one by one now and report back when I found out which one causes the problem.

And I found what is causing the conflict: Extra TiC. I'll be going to post this problem over there now.