Cannot craft Non-Vanilla Items

[korobug]

Title: Cannot craft Non-Vanilla Items

Version: 1_0_3

OS: Windows 7 x64 Professional

Java Version: 7.0.90.5

Description of Problem:

I've tried crafting Balkon and Buildcraft items so far, seems to work, and then when the items in the result section of the craft box, I can't pick it up. As soon as I left click and try to drag it out, it's instantly dropped back in the craft box. I am clueless.

Error Messages:

N/A

Error Log:

Found nothing out of the ordinary in the Logs.