How funny or strange, but i found an 'indirect' way to elude this slowness - i guess.
Going to StarTrek.com **before** logging here does something to the 'Flashplayer' settings and possibly validates a call which yours doesn't.
I also noticed some scripts fail to load (precisely in the Private-Messages section) when IE7 is involved as i was checking it to compare with SeaMonkey behavior.
All of this, of course, might also have a local cause which would need much more verifications before concluding your URL is somehow faulty.
Really strange, though. Firefox_3 compatibility routines, maybe?