So the new fuses came in. I popped a 1.25A slow-blow in and powered it up with the standby switch on to get the full in rush and it didn't blow. I played it for a while, it worked so I started playing with it, toggling the power off and on and then it blew.
So next I tried it with a 1.6A fuse and so far I haven't been able to blow the fuse. The amp works like it did. Nothing's getting hot.
I think I'm going to fiddle around with it a bit more until I call it "fixed".
Still bothers me that I can't figure out why it started drawing more current two months in.