0.98 mail/new problem

[farcusnz]

Using 0.98 have a problem with mail / news client.

After reading within newsgroups if I go back to either of my email 
accounts the get msgs button is greyed out and it is not possible to 
check mail. To correct I must exit mail / news and reload and everything 
is fine again.
Anybody else have this? I have 0.98 installed alongside netscape 6.21 
but have not run 6.21 since installing Moz.