GWT 2 RC1 doesn't work with beta 193

Hi all
the newly released GWT 2 rc1 isn't working
i replaced it with m2 (which was working well) then i invalidated the cache and rebuild the project...
it gives me a very strange message:-
error...
with no details

when i tried to ron the GWT module i got the following message
Unknown argument: -style
Google Web Toolkit 2.0.0-rc1
DevMode [-noserver] [-port port-number | "auto"] [-whitelist whitelist-string] [-blacklist blacklist-string] [-logdir directory] [-logLevel level] [-gen dir] [-portHosted port-number | "auto"] [-remoteUI port-number:client-id-string | host-string:port-number:client-id-string] [-server servletContainerLauncher] [-startupUrl url] [-war dir] [-extra dir] [-workDir dir] module[s]

where
  -noserver    Prevents the embedded web server from running
  -port        Specifies the TCP port for the embedded web server (defaults to 8888)
  -whitelist   Allows the user to browse URLs that match the specified regexes (comma or space separated)
  -blacklist   Prevents the user browsing URLs that match the specified regexes (comma or space separated)
  -logdir      Logs to a file in the given directory, as well as graphically
  -logLevel    The level of logging detail: ERROR, WARN, INFO, TRACE, DEBUG, SPAM, or ALL
  -gen         The directory into which generated files will be written for review
  -portHosted  Listens on the specified port for hosted mode connections
  -remoteUI    Sends Development Mode UI event information to the specified host and port.
  -server      Specify a different embedded web server to run (must implement ServletContainerLauncher)
  -startupUrl  Automatically launches the specified URL
  -war         The war directory to write output files into (defaults to war)
  -extra       The directory into which extra, non-deployed files will be written
  -workDir     The compiler work directory (must be writeable; defaults to a system temp dir)
and
  module[s]    Specifies the name(s) of the module(s) to host

Process finished with exit code -1

i reverted back to ms2 , it works...

any help?
thanks