Jumpshot relies on the AWT/Swing toolkit to perform its graphics operations. We have noticed some problems with AWT/Swing and X11 window system support on some PC's running Windows. In particular, the combination of SecureCRT and Exceed or SecureCRT and Xfree86 often have problems (sometimes serious, including hangs and crashes). For now, the only workaround is to use OpenSSH and Xfree86 (with Cygwin) if possible when using a Windows PC.