Well, this (i thought bug) incident happened to me about a week ago:
I had two ~q200 daggers and one ~q100 dagger. I stacked them together and the qualities averaged to give me three ~q167 daggers. I asked a couple guildies and they told me it was a bug that had happened before but was apparently fixed. So, upon hearing confirmation, I reported it to the bugtracker. About a day later, i checked the bugtracker again and it had been closed. The reason stated was "This is not a bug."
My question is, how can this not be a bug? Do weapons just morph into new weapons whenever they are put together? I would have accepted it and said nothing if the answer was something like "Known problem, being worked on.", but to say that this is not a bug got me very confused. So, i ask you, is there any reason for this?