I'm using kile for creating my .tex files. I have a problem with the special characters (accented letters, arrows, greek letters). I try to use the shortcuts in the left, but when I click on the letters, nothing happens. Normally when you put the mouse over the symbols it shows the respective command as well, but this is not showing neither. Any idea?
(I assume you're referring to the symbol pane.) According to this thread on the forum of Kile's SourceForge page, there seemed to be a problem with dependencies in beta 4 of Kile 2.1, which caused this problem. It was fixed in beta 5, which can be installed from source, or from Debian packages compiled by Philip Muškovac: 32-bit/64-bit.
This fixed the the issue for me as well.