Thanks again, Dana. I think you are correct, there is something I need to change in my editing process. I have been noticing that I'm missing consistency in my editing in general, and that probably causes the varying results I'm having when uploading here.
That smaller version was made from the original photo. First straightened a bit, then cropped. After that did some noise reduction (with NeatImage) and then adjusted the contrast a bit and resize. As a last step I applied some unsharp mask, but tried not to over do it. Saved it with the maximum quality that was possible.
The original photo, after cropping and noise reduction is here: http://wingnut.1g.fi/Pics/Anet/IMG_6573_filtered.jpg
(taken with a Canon 300D with 18-55mm kit lens).