I have same problem here! Not only with wmv files, but with all files, ON SOME BROWSERS!

So, thing is: 
It offer to save file named LinkClick.aspx.
I save it.
When I open this file with compatible software (ie: doc with Word, xls with Excell), it works just fine, however, I can't expect user to know that. (file has stil aspx extension, couse it's named 'LinkClick.aspx' so client WinXP doesn't know what to do with it :))

Current behaivor:
On my computer it works fine. (IE7, FF2.0)
On my client coputer it behaves like this (it saves linkclick.aspx). File is complete and readable in compatibile software, but wrong name (and extension).

Worst thing is that my client goes home at 16:00, so I can't test it indefenetly. And girl got job of her own.

Please, help!

I have DNN 3.3.6, but on Host I got some costum developed modules, on many production portals, so I can't just update DNN to 4.5..

Tnx ppl,
Petar