[RCU] Upgrade 0.4.2 to 0.5.1 => Folders gone, cannot read mail; imap_root issue

[cvb at kruemel.org]

 Hi - I just upgraded from 0.4.2 to 0.5.1 and came across the following 
 issue:

 After upgrading, I ran the installer to test the config. The installer 
 told me that "imap_root" setting in main.inc.php had been changed to 
 "imap_ns_personal". So I replaced the imap_root entry with one reading 
 imap_ns_personal - and did not see any folders anymore, and could not 
 read e-mails anymore. After trying numerous things, I just replaced 
 imap_ns_personal again with imap_root and ... it's working again.

 Why? The installer is not happy with this change - but I am. :-)

 Thanks!
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