file/dir name limit is 107 chars (set by FileInfoBlock fib_FileName field length which is 108. However the last char is the terminating null char, thus 107).
PFS3 can have upto 107 char file/dir names.
You can either use pfsformat FILENAMESIZE=FNSIZE/K/N option at format time, or use setfnsize command to grow the size on the fly. The length can only be grown, not shrinken (unless, of course, you reformat).
[edit: typofix(tm)]
