If I use the keyboard entry for the nth root Ctrl Ctrl, the Ctrl is ok but at ctrl it opens the CDF web deployment wizard. Choosing the entry from the assistant is fine. Paul.
My issues seem to have been cleared up in 10.0.2.
This seems to be fixed in version 10.0.2, at least I haven't seen it happen since I'm using that version anymore...
In case anyone is interested or is seeing the same problem: I have reported the behavior as described above to the technical support and have received an answer which confirms that the problem is triggered by switching the keyboard layout. The problem has been reported by others, is known to the developers and will hopefully be fixed in a future version. For the moment the solution is to not switch the keyboard layout during Mathematica sessions...
Sorry, Albert. I misinterpreted your statement that "Ctrl-C does open a TemplateNotebook" as something you expected rather than something you thought was wrong. (Had I thought a bit more I should have figured that out. The "Publish" key is the one that causes me the most trouble.)
Jim: I know what Ctrl-C is meant to do, I heavily rely on it every day and it is really annoying when that doesn't work, actually when it happens I have to restart Mathematica because without Ctrl-C, Ctrl-V and Ctrl-X working it is hardly possible to get any work done with it, at least for me..
Bruce: I don't think this is a configuration problem. The shortcuts do work alright within a new session, only after a while they become corrupted. And yes, I do reboot every day.
What I do use is a non-English Windows and a non-English keyboard, but I usually set the keyboard layout to English when I use Mathematica. My current suspicion is that this switching of keyboard language causes the problems. As long as I don't do that the keyboard shortcuts seem to work, but if I switch between the English and German keyboard layouts at some point the shortcuts get corrupted and the only way to get them working again is to restart Mathematica (no need to avoid the initialization). It still is only a suspicion but the switch of keyboard language seems to at least trigger that problem more frequently. I have now also seen states where only some of the shortcuts are corrupted but others work. And it is always the TemplateNotebook which opens instead of what the keyboard shortcut really was meant to do. Interestingly there seems to be no dedictated shortuct for opening a TemplateNotebook, but that's probably irrelevant.
On my 10.0.1 on Windows 7, Ctrl Ctrl gives the root with two boxes to be filled in, as Kevin McCann got.
Control-C did nothing visible.
Three levels of quick checks:
Conceivably the OS could be doing something odd. Have you rebooted recently?
Either of you using a non-English keyboard?
Mathematica 10.0.1 Windows 7: Works the same as Kevin's (i.e., as expected). Albert: Ctrl-C is usually assigned to "Copy to the clipboard".
I am using mma10.0.1 under windows 8.1. With the default nb style, Ctrl+2,Ctrl+5 gives me the root with two boxes to be filled in, which is what I think you wanted.
I have similar problems, Ctrl-C does open a TemplateNotebook for example. I'm on Windows 7 and use Mathematica 10.0.1. Which version do you use? Do you still have the problem or did you find out what the problem was?