Observed in pFind 6.3 of BookwormPup64 10.0.8
pFind never finds any match when selecting
[X] Search only current filesystem (IMHO this should be the default!)
Permissions in the "Mode" category. e.g. the very typical Read access for all and Write access for user
When constructing the find command pFind fails to separate the -perm 644 and -xdev arguments with the mandatory whitespace, resulting in an invalid command construct (see statusbar).
I don't expect that this will be fixed. pFind is unmaintained for a long time and has quite a few unresolved problems. Just stating it here for the record.