M33 problem

This image displays the problem I was having with an RGB combine on M33. Click on the image to enlarge it. I've described the detailed background on the RCA messageboard (repeated here below the image) an have provided them with a link to this site.



Camera: ST-402ME
Scope: 80mm Orion EON
Filters: IR filter
Guiding: Unguided
Conditions: Clear sky, but some gusting wind.
RGB Exposures:
R: 1' x 5 Binned 2x2
G: 1' x 5 Binned 2x2
B: 1' x 5 Binned 2x2
Processing: I did the reduction with both CCDSoft and DeepSkyStacker and got the same result. I've tried it with both adding images during the stacking and using a median combine (thinking that what I was seeing might be noise-like), but got the same result (picture attached) when I stacked them. Darks and Flats were used (12 each with both median and average combine).

UPDATE: Thanks to a fellow imager at RCA (Duncan) I've found out what error I made to cause this. When I take 2x2 binned R,G and B images I need to have 2x2 binned dark-frame images to use in their processing. I would assume this would apply to flat-frames too. Makes sense, but I didn't think of it... a bit more learning "the hard way".