Comment 14 for bug 12097

User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2a1pre) Gecko/20090209 Minefield/3.2a1pre
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2a1pre) Gecko/20090209 Minefield/3.2a1pre

This problem might very well be related to several others that have already been filed about the "mailto" functionality, although my setup seems to be more functional than most. As long as Thunderbird isn't running before I click on a "mailto" link, everything works perfectly - but if Thunderbird IS already running, I get a message that indicates that Firefox is trying (and failing) to open an entirely new instance of the program: "Thunderbird is already running, but is not responding" (Thunderbird remains responsive, by the way). I've tested this operation (using identical syntax where applicable) in the OS's pre-installed version of Firefox (3.0), and no such problem occurs, so this is definitely (a) not a Thunderbird issue, and (B) unique to the nightlies.

Reproducible: Always

Steps to Reproduce:
1.Open Thunderbird
2.Open Minefield
3.Find a webpage with a "mailto" address, and click on it.
Actual Results:
Minefield passes the "mailto" information in such a way that Thunderbird then tries to open a second, separate instance of itself.

Expected Results:
If Thunderbird is already open, it should be passed the "mailto" info in such a way that it can simply open a new "Compose" Window, instead of being forced to try to start a new instance of itself.