Memory leak when redirecting to a remote XFree86 server

I'm running a Java application, which controlls our network equipment.
The application is written by our development team. It installs a graphical
user frontend in order to allow interoperation with the network administrators.
The application is run using the following environments:
* Windows NT 4.0
* Sun Solaris 8, local Xsun X11 server
* Sun Solaris 8, XFree86 X11 server located on a linux host
* Sun Solaris 8, CygWin/XFree86 X11 server running on a Windows NT host
It turns out, that the application runs fine, if the application and the GUI either
run both on a Windows NT host or the Sun workstation. However, if the application
is launched on a Sun workstation and the X display is redirected to any XFree86
X11 server, each change of the GUI focus - either forced by a mouse-click, or
an canvas being changed by the application itsself - consumes an amount of
3 MB of memory and never releases this again.
So I suppose any memory leak in the Swing/X11 interface ...
I've already searched SunSolve and installed all patches addressing memory leaks
in Solaris 8 and Xsun ...
Also our development team already has profiled the application using tools
like OptimizeIt without being able to locate any memory leak.
Has anyboday seen this before? Is there any bugfix/workaround available?
Thx in advance,
Jens Hamisch

We just noticed the same problem for our Swing Applet using JDK 1.4 on Solaris 8 displayed to any remote X server running on Windows 2000 or Linux. If we let the applet run long enough (the plot in the applet updated every second), we could easily use up 500-600 Mb. Again, on the local console on Solaris or Windows 2000 the memory was stable at around 70 Mb.

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