OS: Windows 10
Comic Tagger Version: alpha 12 - Windows exe version
Reproduction steps:

• Start comictagger
• Enable Complicated parser and c2c&fcbd removal
• Add the ½ symbol anywhere in a comic's name, e.g Potato Man #½ - Spud's Origins (2093) [Marvel]
• Drop the comic into comictagger
• It now froze and starts gobbling up your memory

Disabling the complicated parser fixes this. I haven't tried disabling c2c or fcbd removal but I don't see how that would affect it.

Searched for 1/2, ½ and half, didn't find any existing issues