Mint 7 upside down

[andrew mace]

Hi all, very new to this Linux stuff and installed Mint 7. All was well until i adjusted something in the Compiz stuff now it boots up asks for user and password ok then loads the screen upside down and black apart from task bar which is along the top of course, instead of the bottom. Agrrr

Any ideas out there !!!

Or is it just remove it and if so how.

Thanks in advance

[falko]

What exactly did you change? Have you tried to undo your changes on the command line?