Colour Depth Windows 2003

So weird problem, colour depth on a Windows 2003 TS server suddenly drop to 8 Bit for no reason.

I applied the MS private hotfix which did not solve the issue so had a dig in the registry at the following location.

HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp

The setttings below had random values so I set back to 0 and the problem went away.

fInheritColorDepth

And the setting

ColorDepth I set back to 4

I also had to set these for the ICA connection as well, weird as no-one confesses to changing anything on the boxes??

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