It's a very weird behavior. My Ctrl+C / Ctrl+V keyboard shortcuts are not being called in my Juno Eclipse. I know it is somewhat broad... But I'm really lost. I'm using Ubuntu 12. Can it be a OS configuration issue?
I've searched a little bit here and I found an interesting issue: my Ctrl+C / Ctrl+V command is being called, but in WRONG file! I gonna explain: I'm programming two different projects, in which both have files with same name. When I open both, and try write on them, Eclipse becomes confused and calls command only in one of they. I have unsuccessfully pasted from clipboard in one, and time later I've found the pasted commands in the other file! Very weird issue. Now I wonder that it can be a workspace bug from Eclipse.