So, over time, I have become a heavy user of the shift-click shortcut. But, almost every time, it gets stuck within five minutes of doing so. Less often, clicking an item will make it drop completely. Both of these problems will not fix without a restart of java.exe. Can't restart the world, but the whole process must be shut down. And, no, pressing right shift does not help. This is all happening under Ubuntu 11.04(yeah, it's outdated - that's another story) and under Technic.