Update - in case you have not seen the WIP pages by Spark - new format options have been added that eliminate the FORUM page scrolling required of the default. There is a FLAT AWESOME format that to me is perfect - white background, black letters, with teal bands between the post and a MASTER LIST type format on the FORUM page kind of like in the old BF. AND there is a FLAT AWESOME + BLACK format that many seem to prefer. The background is black - the lettering is white. I tried it but prefer the White - which I think is especially good for sale threads and other images.
Go up to your user name in top right and select preference then change your browsing preference to one of the 3 options in the first category.
Enjoy - Ray