Not sure if this is really a big deal, but sometimes i get tests that will run forever. The usual, though not very efficient, method to get around the issue is merely to press the back button and start a new test, which usually finishes as expected. However, this still leaves the other test running in the background and bogging down the tests servers i’m sure. Before i waited hours to see if such a test would finish and they never do in that time span and so i give up and start a new one, but this time i bookmarked one of them to submit as a bug:
http://www.webpagetest.org/result/100614_8fab78eb4bbeeb194abca5aa92e0397e/
At least for me currently the test has been running since “06/14/10 16:12:37” without finishing, though a test i did right after it finished within less than a minute.