Description of Problem:
Evolution 1.2 is very slow to check POP3 account,
downloading and checking the headers rather than
using UIDL to look for already-read mail. It
doesn't use UIDL in a case where 1.0.8 does.

Akin to bug#233750, except I ran before-and-after
traces to verify that the POP3 server is 
providing identical responses to the first
few commands from the slow 1.2 and the fast
1.0.8. It is what THEY do afterward that 
makes the difference.

Steps to reproduce the problem:
1. Turned on verbose debugging, captured the
dialog between 1.2 and the POP3 server.
2. De-install 1.2 and reinstalled 1.0.8 (from
Redhat 8.0)
3. Turned on verbose debugging again and 
captured the (shorter) dialog between 1.0.8 
and the same POP3 server.

Actual Results:
Both versions start with a CAPA command to 
the remote POP3 server (an MS-Exchange server's 
POP3 port). The Exchange server replies 
'-ERR Protocol Error' to the CAPA command 
in either (1.0.8, 1.2) case.

The next events in both cases are that Evolution
logs in with the userid and password. 

After those commands and responses, identical 
so far in both cases, 1.0.8 issues a STAT 
and then a UIDL, both of which are accepted.
Evolution 1.2 instead issues a LIST and 
then begins slowly and painfully issuing
'TOP nn 0' commands for each header in the
list.


Expected Results:
Use UIDL when the POP3 server gave the same
responses that allowed 1.0.8 to use UIDL.

How often does this happen? 
Every time one polls the POP3 server, if there
are any messages left on the server.

Additional Information:

Running Redhat 8.0, using either Evolution 1.0.8
from RH, or the new 1.2 release from Ximian.