I was having trouble with the displays not refreshing on Windows 95 and 98 SUTs, and then the kind folks at Redstone set me right:
THE PROBLEM
Using RealVNC on Windows98 for one of our SUT’s, the screen does not refresh (only a block under the cursor) without control-clicking on the window… what settings will ensure the screen refreshes? The ‘force screen refresh’ is labeled specifically not for use with RealVNC.
THE SOLUTION
Right, that definitely doesn’t work with RealVNC. The only thing we can think to suggest right now is to check the RealVNC server “Update Handling” options. All of the left hand options and none of the righthand options should be checked.