I am using the latest version of the avr-eclipse (at least software update does not give me a newer version).
If I read the cpu frequency from the device it gives me 1Mhz. Despite the device runs on 8Mhz. Don't know if it is a bug.
But if I set it manually to 8Mhz and aplly the settings close the properties dialogue and open it aain it is back at 1Mhz.
Could this be a bug?
My workaround is to set F_CPU by hand.