[Ultimate] crash when right clicking on a timer

[r0d]

Hello,

sometimes (not everytimes), when I right click on a timer (redpower) to modifiy the delay, minecraft just crashes brutally.
I made some researches, but I don't find anything about this problem.

Here is a log on pastebin: http://pastebin.com/yyjM98hm
This log represents the following case: I launch FTB, load my game, then, the firt action I make is right clicking on the timer (I don't even move before this right click), then minecraft crashes.

Details:
My pc: 16Go DDR3 RAM, cpu i7 8 cores, HD SD 256Go, running on windows 7 64bits, with java 7 64bits.
Texture pack: bdcraft 128x for FTB
I only added optifine 1.4.6_HD_U_D5
I play in local (not a server)

Thanks in advance for any help.
r0d.

 

[ICountFrom0]

Known bug (look at the topic)
long standing one.
Note, it happens when you do not have an empty hand when right clicking.

 

[r0d]

Okay, ty