F10 Evo filtering unbearably slow

[Matthew Saltzman]

In F10, Evolution's filtering of incoming mail takes forever--much
longer (according to my impression) than in F8.  In addition, I
frequently see errors related to checking for junk mail along the lines
of: Pipe to spamassassin failed.  The same thing happens if I use
bogofilter in place of spamassassin.

Anyone else seeing this behavior?  Any suggestions for
fixes/workarounds?

(I use the Exchange connector, so please don't suggest another mail
client.)
-- 
                Matthew Saltzman

Clemson University Math Sciences
mjs AT clemson DOT edu
http://www.math.clemson.edu/~mjs