Job Won't Start Processing

Question

I'm running Compressor 3.0.5 and Snow Leopard. Everything's been running smoothly until yesterday. When I submit a job, either from Final Cut or by adding a file directly to Compressor, the job's message quickly changes to "Unknown time remaining" but it never starts crunching.
Batch Monitor shows a job that's stuck on Canceling. I can't remove it from the list. I'm assuming this is what's clogging up the works. How can I get around this?

Answer 1

Ah, I forgot about that thing! That cleared it from the list, but so far hasn't solved the problem of not actually starting to process my files.
Right now, I dragged a PhotoJPEG movie file into the window like I've done a million times before. I then hit Submit (already have my custom default setting) and wait.
Usually, it will think for a second or two, then quickly the progress bar would jump to 33%. This type of job should only take a minute and a half. It's now over 10 min. without a single blip on the progress bar.
Very frustrating.