I am using nx-3.5.0-2.1.el6.centos.x86_64 and freenx-0.7.3-9.4.el6.centos.x86_64, but I think the problem is with the NX libraries in the nx package. I have also seen the problem with the equivalent CentOS-5 packages on a 32-bit machine.<br />
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Sometimes, when resuming a suspended session, some open applications have no text or graphics such as button icons and spreadsheet cells. This has happened with gnome-terminal and LibreOffice so far, but I have no reason to think the problem is specific to those. When the problem occurs I can find no way to make the applications start working properly, and starting new instances doesn't always cure the problem either. In those situations the only way to carry on working is to terminate the session and start a new one.
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