Keyboard for remote control flaky

Using the Linux client when I remote control do remote control (support) I'm able to control the other user's computer via my mouse and keyboard, but certain keys fail.  For example, I can type a certain letter like "a", but I won't be able to type "b", but I could type "B".  When I use capslock, all of the letter seem to work (in uppercase). Lowercase is hit and miss. Symbols generally don't work.