Broken internationalized names of IMAP folders after upgrade from 8.6.0 to 8.8.12

[sergetsp]

Hello all,
I have upgraded the Zimbra server (Centos 6) from 8.8.6 GA_1194 to 8.8.12_GA3794 FOSS.

After upgrade all existing IMAP folders (names of folders) containing an internationalized symbols (cyrullic, russian) are not displayed correcty in
IMAP clients (Thunderbird v6.40,6.60) excluding the WEB verision of Zimbra.

If I try to create new cyrillic name of folder in the WEB version it is not displayed
correctly in the IMAP client and vice versa.

Do you have any ideas to solve this problem?

It is possible rename folders in WEB, but local Thunderbird filters for this folders
are steel not worked.

[pup_seba]

Hi,

Zimbra support just confirmed that this is a bug. If you want to see other issues with upgrades, go check this post: viewtopic.php?f=13&t=65924

Maybe you also need to disable legacy backups, who knows...