I see a few others with the same white box as mine. I see others with the rF2 icon in place of the white box, meaning their game is validated. I first thought it was due to updating to 125, but I know this probably isn't the case, since many others using 125 show their game as validated. Here is a shot of what I am talking about, boxed in blue lines.
When you visit your forum profile page, you should be able to link your forum and game account. Look for the "Sync Forum with rFactor2" link.
I think the white icon means you edited your forum profile after you valitated your forum account. Ie, as Luc pointed, a new sync might fix the issue.