[Evolution] Synchronization problem ..?

[DE VITO Eric <devito reno far cea fr>]

I began to use evolution since some days. It worked nice until I get suddenly 
in an annoying problem : when I launch evo (0.10cvs) addressbook/calendar 
work ok, but as soon as I try to click on a message to read it, evo freezes : 
a bar at the bttom of the window goes from right to left to right as if it 
was searching for something (what ?), and sometimes ( not always) I get an 
error message about synchronization problem with a folder, and sometimes it 
crashes ...
Since that problem I cannot use evo :-( . What can I do  ? (I already tried 
to launch evo from scratch by moving evolution folder to evolution.old but 
the problem  remains ...