Nowadays I use SQL Developer on a daily basis, and I like it more and more. But every now and then something rears its ugly head, and that can be annoying.
Just this morning I had one of those encounters. The "Backspace"-key stopped working. Not only the backspace, but DELETE, ENTER, navigation with the arrow keys...
I tried re-installing SQL Developer, reboot the computer... no success.
"Google is your friend" at times like these. One of the first hits I came across was this blog post and that solved my problem.
The only thing you need to do is go from the menu "Tools -> Preferences" and in the Preferences window to "Accelerators", push the button "Load Preset" and pick the Default. And that's it.
Now it works like a charm again.