Apparently, you can use http://timestamp.verisign.com/scripts/timstamp.dll
instead of the main Comodo timestamp server.
Ideally, I would be able to use Comodo's main timestamp server (it looks better for the product to be signed by the same CA).
Pretty ridiculous for it to be down at this time.
(Sorry for the slight vent above - just slightly annoyed with fixing a bug and it "hurts" to have another non-related error show up in the middle of coding)