[Evolution] How to remove duplicates Mandriva 2010.1

[OndÅej Skuhravà <ondra sk volny cz>]

Hi all,
I have migrated from Mandriva 2010.0 to Mandriva 2010.1 and installed
Evolution 2.30.3. But I have a problem. Sometimes Evolution downloades
all emails one more time. As a result, my inbox became full of
duplicates. On Mandriva 2010.0 and earlier there was the "remove
duplicate" plugin, which worked fine. But now I can't find it in my
repo. If I find it on the Internet, it does not work on my linux
machine. Is there different possibility how to remove duplicate or does
exist newer version of the plugin?

Thank you Ondrej