Samsung LCD (215TW) Rotation Notification Problem

Hello there, I have a Samsung SyncMaster 215TW 21" LCD monitor, about 18 months old. Recently it has started randomly flashing up a little blue square in the center, usually twice in quick succession. Usually the first time is blank and the second time contains a 0 with a little degrees symbol above it. The frequency of this is totally random, sometimes 1-2 times a minute then not again for hours.

I called Samsung technical support and they said it might be a driver issue and related to the monitor thinking its orientation has changed but after uninstalling, reinstalling and trying on multiple OS variants the problem still persists.

Has anyone else experienced anything similar and no a way to fix it? Is there a way of turning off these notifications? Do I need to abandon it as a possible loss?

Thank you in advance to anyone who can help me out with this!

James