Hmm, interesting.
I managed to turn it on while holding the volume up button til the lockscreen appeared, but it doesn't say safe mode on the top, and my status bar is back (it was previously hidden with "No Status" tweak).
Now I can open up Cydia. The last tweak I was trying to download was "Glasklart HD" theme, but it came up with a hash sum mismatch error. So I rebooted and got the problem.
I checked in Cydia to see if it had downloaded, but it's not in my installed list. It was in the middle of downloading when I got that hash sum error, but doesn't appear to have made it through.
Weird.
EDIT:
Still have the same problem upon rebooting without holding the up volume. How do I delete the app that's causing the problem if it never even downloaded into my installed list??
😕😕😕