There's two minor issues with the x86 2.42 release;
Firstly it takes over 30 seconds to "start" when enabled in frontview, and once it starts frontview incorrectly displays a message that it failed to start (even though it does start successfully). So there's an issue between the frontview portion of the add-on and the transmission service itself.
Secondly, the service DOES fail to start once the NAS is restarted, and a manual restart has to be performed. This leads to the same behaviour described above, but it does start and can be used.
Currently not experiencing any other stability issues (i.e: crashing or high CPU usage) but this is more likely due to the fact i'm only seeding one item and not downloading anything else.
[EDIT]: Just checked the transtart.sh, transtop.sh and blocklist.sh files as suggested by super-poussin in this thread (although he's referring to the SPARC version);viewtopic.php?f=36&t=52212
Anyway, the password for the admin user, as specified in these files is still saying "password1" even though I've changed the password for the admin user. So I manually changed the password for those three files to what I set via the web interface. Transmission still takes a bit longer to start up, but now says "Transmission Service Started" instead of "Failed To Start". Not tried a reboot or blocklist check as of yet, as the NAS is busy doing other stuff.
My guess, permissions issue on those three files?