When I try to upload a file on any XF forums - my own which are either 1.15 or 1.2 - and here - I can call the dialogue and browse to the file. But then the dialogue box either hangs or it switches to "No file selected." If I click Close, and post, the post appears with the attachment on it. I just started using a new laptop (Win7) so maybe I have a setting that isn't working well with XF. I use Firefox and I have various addons to block ads.