[Bug-wget] Output filename not same as from browser save...reason?...bug?

[Linda Walsh]

I just noticed (actually noticed this before, but just now got around
to _really_ noticing enough to write a question about it :-) )

When I do a file save in Firefox of a file, it saves it by a name I recognize
(it's a mod/extension for Oblivion)..

filename: origin_of_the_mages_guild_6.1.zip

But when I copy the address and go into a shell window and allow wget to 
download
it, I get some 'semi-random' (random from perspective of relation to original
filename, not from URL content).

I was wondering why the browser gets the filename "right", but wget
stores it according to some intermediate URL-based name...

Is this something that could be considered a "bug" -- i.e. it's not downloading
the file into the filename I *want* (I know I can override the output filename 
with
-O).  I.e. -- it may be following some "spec", BUT if it is, how is it that the
browser gets the filename right?

Thanks...
Linda