Does anybody know anything about this? I see in the changelog
(http://www.httrack.com/page/4/en/index.html) that in version 4.20 this issue
was supposedly addressed (Fixed: iso-9660 option now using '_' for collision
character).

Has it already been broken or am I misunderstanding this item?
Just for reference, what I am seeing is the following:
The two files named
    my-file-with-name-a.html
    my-file-with-name-b.html

are being downloaded as
    MY_FILE_.HTM
    MY_FIL-2.HTM

The odd part is that the hyphens in the original filename are being converted
to underscores correctly.  But then a hyphen is incorrectly added prior to the
number - weird.

This could easily be solved by either making the added hyphen into an
underscore (i.e. MY_FIL_2.HTM) or by dumping the hyphen altogether (i.e.
MY_FIL2.HTM).

Is this still a bug (if so, are there any plans to fix this)?
Or was it fixed an then un-fixed (if so, can I get the old version somehow)?