Interesting... mind sharing the flash apk you had in your titanium?I actually had a flash player installation backed up in Titanium that I had restored. I uninstalled that, just using regular old Uninstaller, and when I checked /system/app in root explorer, I didn't see any evidence of a flash install.
Then installed the modified version from Astro, made the "about:debug" changes mentioned, and we're up and running.
I'm not sure why, but maybe if you install the standard flash beta, uninstall it, then install the modified version that will work?