I've had the same issue of this SO question - Eclipse 3.7.0 Indigo with CDT shows many false compilation errors - and since it hadn't solution (the provided answers didn't solve the problem, nor to the question maker who didn't accept any answer, nor to me) I decided to start a bounty.
I realised that even with a bounty the question wouldn't receive much attention, since no other answers or comments were made.
During the bounty period I found the solution, and would like it to be accepted (not for the sake of the bounty but for the answer itself) what can I do?