[plt-dev] drscheme error in current SVN

Hi,

When i run drscheme built from today's SVN source tree, i get this
error:

primitive-class-prepare-struct-type!: expects 8 arguments, given 6:
#<primitive-class> #<struct-type-property:object> #<class:object%> #<procedure:preparer> #<procedure:dispatcher> ()

 === context ===
/usr/local/stow/plt/lib/plt/collects/scheme/private/class-internal.ss:1810:0: compose-class
/usr/local/stow/plt/lib/plt/collects/mred/private/kernel.ss: [running body]
/usr/local/stow/plt/lib/plt/collects/mred/private/lock.ss: [traversing imports]
/usr/local/stow/plt/lib/plt/collects/mred/private/helper.ss: [traversing imports]
/usr/local/stow/plt/lib/plt/collects/mred/mred.ss: [traversing imports]
/usr/local/stow/plt/lib/plt/collects/mred/main.ss: [traversing imports]
/usr/local/stow/plt/lib/plt/collects/scheme/gui/base.ss: [traversing imports]
/usr/local/stow/plt/lib/plt/collects/drscheme/drscheme.ss: [traversing imports]

Thanks,
jao