[plt-scheme] Debugger Bug in 301.5?

Hi,

Not sure if this is a known problem but whenever I press the Debug
button on DrScheme (linux, compiled with gcc4) I get:
procedure annotate-for-single-stepping: expects 6 arguments, given 5:
#<syntax:1:0> #<procedure:...ke/debug-tool.ss:511:23>
#<procedure:...ke/debug-tool.ss:518:23>
#<procedure:...ke/debug-tool.ss:522:23>
#<procedure:...ke/debug-tool.ss:481:46>

which means... no debugging on 301.5...

Cheers,
--
Paulo Jorge Matos - pocm at sat inesc-id pt
Web: http://sat.inesc-id.pt/~pocm
Computer and Software Engineering
INESC-ID - SAT Group