Firefox 1.5 issues

I seem to have three issues right now with the win32 version of Firefox 1.5.

First, every time I try to view a .wmv file, it pops up a box asking if 
it should save it to disk or view it with (default) media player.  The 
little box that says "do this every time" is auto-checked.  And yet, the 
next time, it's asking again.  Apparently the 'do this every time" box 
isn't working.

For the second issue, I went to the mozilla.com site to see about 
sending feedback for the first issue... and saw about newsgroups.  It's 
listing netscape.mozilla.user.win32, though, which doesn't seem to 
exist.  The only one my news server knows about is 
netscape.PUBLIC.mozilla.win32.

Finally, when I clicked on the link to netscape.mozilla.user.win32, it, 
uh, put me in Outlook Express.   Even though I have Thunderbird 
installed and set as my default news reader.  Automatically picking 
Microsoft in spite of defaults strikes me as a big no-no.