having just bought a GH1 it is the first time I've been able to see the difference between the sensor sizes of the G1 and the GH1 ... although I've read of this on the web I had not seen any actual examples of how it looked, only some theory.

So this is the difference between 4:3 and 16:9 when using RAW and processing to keep the full image size (and not fix lens aberrations)

For me when using legacy lenses on my GH1 the lens aberration fix is somewhat moot ...

I put a little more detail about it all on my blog here (for anyone interested).