Running the Xming client on Windows 7, I have found that Xming displays application splash screens incorrectly.
The window border is larger than the splash image resulting in a grey area round the image. This is the case for both Eclipse and Sun Studio apps running on a Solaris box.

When I switch to using the Cygwin-X client the problem goes away.

This might seem a trivial issue but the Xming client also seems less responsive than Cygwin-X.

I am using the multiple windows option in XLaunch for Xming. I am logging on to the unix box with putty and using X Forwarding.