[plt-dev] Error on startup with 5.0.0.1 relese candidate

I did a self-contained install of the 5.0.0.1 release candidate (using
the "racket" installer, so no sources, for debian stable), and when I
try to start racket, I get this:

Welcome to Racket v5.0.0.1.
/home/vincent/plt-5.0.0.1/collects/racket/match/compiled/compiler_rkt.zo::14765: read (compiled): ill-formed code [../../../racket/gc2/../src/read.c:5116]

 === context ===
/home/vincent/plt-5.0.0.1/collects/racket/match/gen-match.rkt: [traversing imports]
/home/vincent/plt-5.0.0.1/collects/racket/match/define-forms.rkt: [traversing imports]
/home/vincent/plt-5.0.0.1/collects/racket/match/match.rkt: [traversing imports]
/home/vincent/plt-5.0.0.1/collects/racket/match.rkt: [traversing imports]
/home/vincent/plt-5.0.0.1/collects/racket/main.rkt: [traversing imports]
/home/vincent/plt-5.0.0.1/collects/racket/init.rkt: [traversing imports]

> (+ 2 2)
stdin::0: compile: unbound identifier (and no #%app syntax transformer is bound) at: #%top-interaction in: (#%top-interaction + 2 2)

 === context ===
/home/vincent/plt-5.0.0.1/collects/racket/private/misc.rkt:74:7

>


If I try to run DrRacket, I get a similar error.

Vincent
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