...I've suffered this problem many times and so do my colleagues Sometimes after you stroked some keyboard and mouse combinations this behavior showed up : you have to click a xterm's title bar to focus on that term so that you can input, instead of any places in that window. Whatever you do, minimize, resize don't help. This only thing you can do is logout that session but all the working history will be gone(of course I can save that but it's awkward) I'm eagerly wondering is there any solutions to this? I use ctrix XenApp plugin 11.0. The other platform info: Linux 2.6.9-67.ELsmp x86_64 OS: RedHat Enterprise Linux 4.0 U6 xterm:X.Org 6.8.2(192) THanks!