Many times when you make a change in a popup window, our system sends a command to the main window below to Refresh the page to reflect the change you just made.
Sometimes if you have other browser windows open, your browser can lose track of the parent window's location so when the popup sends the Refresh command, it cannot determine which window to refresh and therefore leaves the blue screen up to indicate the refresh command was not properly completed. Note that your data changes are always saved, and this is merely an issue with your browser not refreshing the bottom window automatically.
Since your data is always saved, the blue screen problem can be temporarily worked around by just closing the popup blue screen and clicking the main screen's Refresh/Reload button (or pressing F5 key) to manually reload the page.
Usually this refresh problem is due to instability in your browser (most often Internet Explorer), and closing and reopening Internet Explorer or a restart of your computer fixes the problem.
However if you have restarted your computer and the problem is still occurring, it may be due to Spyware/Malware running on your computer. You might try using our system on another computer to find out if the problem is isolated to your computer system. If both computers have the problem, please let us know. If you do not have this problem on the second computer, we recommend running anti-spyware programs like Spybot SD or AdAware (both are free) to scan your first computer to detect spyware that may be adversely affecting your internet browsing of secure web sites.