Issues I noticed when using the plugin were of various kinds:
missing Koala Painter $81 marker bytes in the filenames
SACHS-PICS.D64.gz
D81s directories being truncated to 145 entries
200files.d81.gz
inability to cope with some customised filenames
colosus4_8_1.d64.gz
and character set tricks
booze_design_royal_arte_final-A.d64.gz
and directories not being displayed at all...
doom_workstage.d64.gz