Don Syme writes:
 > William Chesters writes:
 > 
 > > > And, on a vaguely related topic, is it possible to use threads with
 > > > programs that also use OCamlTK? I know Tk is not threadsafe, but if
 > > > only one thread is calling Tk functions, then perhaps it's still OK?
 > 
 > >   No, `Tk.mainLoop' blocks the whole process.
 > 
 > Hmm... it seems not to, under Windows NT/bytecode.  Maybe this is because
 > Tk.mainLoop gets linked against a non-blocking library of code under
 > Windows.

Aha, it works for me too under Linux with native code/pthreads.  I
still have the test program from months ago which supposedly
demonstrated the opposite ... and it works too!  Oh well :-).
Probably wrong link options or something.