[plt-scheme] Problem require-ing SLIB 3a2 with DrScheme (299.400)

DrScheme 299.400, Linux, built from source.

I downloaded SLIB 3a2 from

http://swiss.csail.mit.edu/ftpdir/scm/slib3a2.zip

I unzipped the file, moved the resulting 'slib' directory into
$PLTHOME/collects (same location as the 'mzlib' dir, as suggested by
the DrScheme Help Desk). $PLTHOME is /opt/plt, if it matters.

Now trying to run just:

(require (lib "load.ss" "slibinit"))

gives me this response:

../../../plt/collects/slibinit/init.ss::9553: string=?: expects type
<string> as 2nd argument, given: #<path:/opt/plt/collects/slib>; other
arguments were: ""


Any ideas re: what's wrong?


Thanks,

Pete.
-- 
http://flooble.net/blog
	"Are you police officers?"
	"No, ma'am.  We're musicians."
		-- The Blues Brothers