Evolution slow, Tbird fast - with IMAP

[Sasa Stupar]

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I am testing Evolution 1.4 and TBird 0.9 on FC2 for IMAP access. I have
for now uw-imap server. I was testing especially with one account which
has about 20 folders (roughly 1 GB of messages). Both clients are setup
to use filters to sort out mail to corresponding folder from inbox. What
I found is that a lot of times Evolution is blocked or it loads slowly
messages to read and also sorting messages to folders from inbox while
Tbird is lightening fast in all those actions.

Is this a known bug on Evolution or what?
I'd like to work with Evolution but the speed makes me frustrated.

Regards,
Sasa
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