Selenium (RC) hangs when started from Python test

Question

Fairly new to Selenium (but loving it). I'm running a single test in Python on Selenium RC. I've been running it multiple times a day for about 3 weeks. Now when I try to run it, it executes all the commands before it's supposed to invoke Selenium, then just hangs. Selenium appears to be running fine (except for this issue). What should I check?

Thanks in advance!

Edit #1

For example, my test begins with:

def setUp(self):  
    os.system("killall firefox")  
    self.verificationErrors = []  
    print "Starting Selenium..."  
    self.selenium = selenium("localhost", 4444, "*chrome", "http://someaddy.blah.com/")  
    self.selenium.start()  
    print "Selenium Started"</pre></code>

I get:

firefox(2194): Operation not permitted
firefox(10039): Operation not permitted
firefox(23890): Operation not permitted
firefox(26220): Operation not permitted
firefox: no process killed
Starting Selenium...

returned, and it will just hang there indefinitely.

Edit #2

Now it's getting to the same point ("Selenium Started...") and erroring out with BadStatusLine.