You may have to read this post couple of times. I've looked at many articles, including this: http://kb.mozillazin...rotocol#Windows - & everything seems right in registries on all machines I have (or 2 Fx versions on same machine). The registry entries for Magnet association are the same on machines (or different Windows installs) - for Firefox versions / installs THAT WILL - OR WON'T D/L magnet links.
For some Firefox installs, in Options >Applications, the "Magnet" content type shows up & offers option to choose app to use (but read on).
For other Firefox installs, (perhaps on other machines OR SAME MACHINE, but same Windows OS), there's no Magnet content type listed in some Fx Options>Applications: IMPORTANT - IN BOTH CASES, the registries show exact same entries in HK_Root\Magnet\. The different registries' entries appear to be identical to each other AND identical to various articles instructions of what should be in the registry.
Of course, on SAME machine, same OS - registry entry IS the same. But one Fx install handles magnets (& shows magnet content type) & another Fx install does NOT show magnet content type. Both are using same registry.
All the machines have same version of uTorrent. (uT's "Associate Torrent Files" button has been clicked). The ONLY difference I see is in the different mimeTypes.rdf files in the different Firefox installs (that either WILL or WON'T d/l Magnet links).
In Fx's that WILL d/l magnets, the mimeTypes.rdf file contains several lines about "magnets." In Fx's that WON'T d/l magnets, there are NO lines about "magnets." EVEN THOUGH the registry key is identical in both cases, that's supposed to allow specifying ( in a pop up) which app to use, when click a magnet link using Fx.
How did the "magnet" lines get in some Fx installations' mimeTypes.rdf files & NOT in others, when same uTorrent is installed, & registry entries in both case, are the same? The diff registry entries (in diff installs of Vista) even have exact same string / path to the uTorrent executable.
1) Is the absence of "magnet" entries in mimeTypes.rdf file the reason some Fx installs won't / can't d/l magnet links?
2) If so, how do you fix it, when their respective registry entries, to control magnet associations, are already identical? Copy a mimeTypes.rdf that contains the "magnet" lines over to Fx installs that won't d/l magnet links?