Hi,
That does not necessarily mean the project has to be forked, only that someone needs to be willing to maintain the Windows code - by which I mean (at the very least) following the development process and making sure that changes don't break Windows compatibility. Otherwise we'll end up with the same situation that killed Classic Mac OS support on Mozilla.
AFAIK, the port of Sylpheed-Claws to Windows uses gtk 1.3.x (which is closer to gtk 2.x than to gtk 1.2.x). If someone wants to port Dillo to Windows, he can look at how Sylpheed-Claws I/O infrastructure was ported to Windows. Sylpheed-Claws does not use pthreads, but it forks to access to POP3 mailboxes, as Dillo forks to do DNS lookups, IIRC. We have a CVS branch for the Windows port. I think, if someone does not already have the experience of porting to Windows, looking at Claws versions can be very helpful, as our port is done by a very knowledgeable guy. -- Melvin Hadasht