What terminal emulator do you use ?
poltergeist: 1. Tilda. 
  * Buggy when you have transparency enabled and resize ( or  minimize and then maximize ) the terminal. Otherwise, looks and feels great.2. Yakuake.
  * No bugs that I have discovered, and looks great. Is meant for KDE, but works awesomely on GNOME as well. The only nuisance is the title bar ( which can, at present have a minimum height of 1 pixel ), and we can't make it disappear completely.