Set default.page.size to a value < 500, and restart management server.
Next in a list API call (for instance, try using cloudmonkey), set page size > default.page.size. The call will fail because page size is too big, and a Status message box will pop up in GUI.
The problem is that the Status message box will keep popping up every time a usr logs in, even though 'Close' has been clicked to the message box. The message box also pops up to other users who did not issue the API call.
The problem disappears when the default.page.size is reset to 500.
Another problem is that an API call leads to the message box. Why should an API call lead to a Status message box on GUI?