I just created an asx playlist using your Warren Zevon example above,
and yes, Playlist Loader adds /.wma to the end, and the stream doesn't play.
On the other hand, this asx loads and plays perfectly,
and Playlist Loader doesn't add /.wma to the end
because filename.wma is already specified at the end of the stream url.
<TITLE>A Perfect Circle - Annihilation</TITLE>
<Ref href="mms://mms.content.loudeye.com/600111/o/076/61/93/0766193_0101_00_0690.wma" />
So I guess that it needs to do the same if filename.asf is specified at the end of the url, as in your asx sample, thus letting in_dshow handle it instead.
However, in your case UJ, you will need to manually edit the url by adding ?=.wma to the end, to make in_wm handle it instead (because you don't have in_dshow installed), heh.
As it stands, everyone else who's using Full, not Lite, will also have to manually edit that
url (via: right click > playlist entry) by either removing the /.wma from the end to let in_dshow handle it, or by changing it to ?=.wma to let in_wm handle it instead.
So yes, Playlist Loader could be modified to also not add anything if filename.asf is specified at the end, the same way it does if filename.wma is specified.
Again, this will only benefit WA Full users, not Lite.
In all other cases, then (for now) /.wma should/has to be added by default,
and if it doesn't work (due to one of the known issues) then the url will need to be manually edited - until DrO can maybe come up with some other ingenious idea/workaround ?!