If it's officially XenForo, then here's an idea-- in the logo try making the X a little bigger, but not as big as a full capital X. In height it would be halfway between the height of the lowercase letters and the capital F.
And what is the official abbreviation? xf, XF, xF, XenF (which is like Senf in German, which means mustard or also giving someone your opinion as in you give someone "Senf")
My opinion:
Logo: xenForo - looks cool
Full Title: XenForo or xenForo, don't really care
Abbreviation: xF - looks cool and it's the only thing that seems natural to me
We are using XF from XenForo. Of course the only other 'xf' (that I know) is a car, so no confusion there! Well, it is unlikely to be confused with something else whether it has capitals or not
We are using XF from XenForo. Of course the only other 'xf' (that I know) is a car, so no confusion there! Well, it is unlikely to be confused with something else whether it has capitals or not
XF is the right one.
Logo should also be XenForo. The X could be a little bigger than the capital X or a little smaller with a different color. xenForo does not look that good.
Just my 2 cents.