problems running v. 70-190a with ACL 6.2

I've been having a problem running the acl/jkf version of release 
70-190a with ACL 6.2.  The code seems to compile and load
okay and pages can be exported without complaint, but attempting
to open a page exported under this version produces an error 
similar to

Error: HTTP::PATCH-INITIALIZE-RESOURCED-SERVER got 4 args, wanted 5 args.
  [condition type: PROGRAM-ERROR]

Restart actions (select using :continue):
 0: Abort entirely from this process.
[Current process: HTTP Server [8000] (localhost)]
[1] CL-USER(1): 

I've tried opening a number of exported pages with
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6)
Gecko/20040113 and
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030624 
Netscape/7.1. - always with the same result.

Any thoughts on this would be welcome.

Thanks,

Ben