Failed to launch browser

I just tried the hosted webpagetest. When I run the urlblaster, I get the following error in the urlblast_log.txt log file…

2011/11/11 15:32:03 -1 0 1 18 0 Error Failed to launch browser '?/?.system cannot find the file specified.
’ - Firefox

I am also seeing this. Did you find a resolution?

what does your locations.ini look like (specifically is browserExe= defined)? It shouldn’t be configured for normal IE testing.