Rafael,
There's a base64-procs.tcl, mime-procs.tcl and md5-procs.tcl in that dir.
$ more base64-procs.tcl
# base64.tcl --
#
#......
Looks like the filenames have changed from *.tcl to *-procs.tcl
This thread may also be useful:
https://openacs.org/forums/message-view?message_id=51834
cheers,
Torben
