Bug introduced in 10.0 and fixed in 10.0.2
As some of you might know, if you press Control+Shift on windows, you change your keyboard layout. For example, : becomes ±. This happens sometimes in Mathematica, and it results in a weird bug: control z no longer works, even after you change back. Sometimes I'll be writing and suddenly I see ±, so I know I have to press control shift, and I can type : again. However, if I use control z, it opens the wolfram demonstrations page http://demonstrations.wolfram.com/, and so does undo under edit. The only way of getting rid of this is completely quitting Mathematica, which is quite a hassle, especially as I usually find out when I want to actually undo something. This means that I actually cannot undo this, which is very problematic in some cases.
Does anyone have experience with this bug?