Looks like your files are corrupted?

Could you post the output of "DIR" run on your C:\Program files (x86)\maemo\flasher-3.5?

I happen to have those images here at work (hopefully correctly downloaded, but this is unconfirmed).

COMBINED is 200 174 197 bytes, and
VANILLA is 262 090 105 bytes

The actual size on disk may and will actually differ from the above. That is not a problem.