Please search before you post about a known Bug.
If you mean that this bug is already known, then why in the new version Industrial Craft2 this bug still not fixed 
Posts by AJIEKC
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I saw this bug still in Indusrial craft2 v 1.90.
For example if you put it next to the eight Minig Drill
and press the rightmouse button - the game crashed (in client), or throws the menu (on the server).
After re-entry in game, toolbox will open, and things do not disappear.
And if more time on it to press, these things are copied.
Please fix this bug.
P.S. Sorry for my English because I am from Russia and I badly know this language.