In theory, no. But you should be aware that the default 'Main Identity' is
much more prone to corruption (-> loss of messages!) than a Named Identity.
For best reliability, I suggest you create another Named Identity, import
messages from the old 'Main Identity' and then delete the old one
(File>Manage identities).
Before installing SP2, address the following general caveats:
Don't use Inbox or Sent Items to archive messages. Move them to local
folders created for this purpose.
Disable Background Compacting and frequently perform a manual compact of all
OE folders while "working offline". More at
http://insideoe.tomsterdam.com/files/maintain.htm.
Your anti-virus application's email scanning feature can also cause such
corruption. Disable it. It provides no additional protection.
Then 'Take Out the Trash':
http://aumha.org/a/health.php#tip6
Now see:
Are You Ready for WinXP SP2?
http://support.microsoft.com/default.aspx?pr=windowsxpsp2
--
~Robear Dyer (PA Bear)
MS MVP-Windows (IE/OE), AH-VSOP
What You Should Know About Spyware
http://www.microsoft.com/athome/security/spyware/devioussoftware.mspx
AumHa Forums
http://forum.aumha.org