At least these OFP file format references:
- FXY (font) Fxy%20Fonts.zip
- P3D MLOD P3d%20file%20format.zip
- PBO Pbo%20file%20format.zip
- Pristine Addons (Revised) Pristine%20Addons.html
The %20 is the space in the filename I think, and in principle it should work, but it doesn't.
Edit: You know what? I tried to download "Faces and Voices.Cain.zip" from OFP Units and Vehicles, and it works perfectly! And I get no %20 in the filename... when I try the others which I listed above, the %20 is in the filenames and I think that is the problem. The filenames in the above list are direct copy&pastes from the "Save" dialog I get when I try to download the files. I assumed that the %20 is automatically inserted to replace the space, like I recall it can happen with URL's but ""Faces and Voices.Cain.zip"" doesn't have it and I guess only you can figure out what the difference is between those files...
Seems like I wasn't wrong when I had a feeling that a space in the filename should be no problem to Linux+Opera/Konqueror.