I figured out why I had an older version (48.3) of ixemul.library installed, it was the last version to support Amigas without FPUs, and I'm trying to run this on a 56Mhz 030 without FPU. So I installed the latest version of ixemul.library (63.1) on my other A1200, which has a 50Mhz 030 and 128MB RAM and FPU. This time it crashed while it was loading. The main window came up but I got a software failure. I tried it a few times after reboots and still failed.
I have a feeling it's ixemul.library. The current version was made for WinUAE and AFAOS, not real Amigas. It seems these days like the only way to run new Amiga software is with Amikit on a Windows PC, which I don't own and don't want to use.
Here's the debug log from my A1200 with the FPU and the latest ixemul.library. It's odd that the program crashes before I even have a chance to type, send a tweet or click any of the buttons, but it still seems to be trying to retrieve the feed. I don't know...
http://pastebin.com/9eVey1RF