login problems on 2.3.8

[Roberto R. Morelli]

Hi Everyone,

Just upgraded to verion 2.3.8 on backup system (sync system) to test the new 
version and now get the following:

Apr 17 07:34:20 xxxxxxxx imaps[5446]: badlogin: xxxxxxxx.xx.xxx 
[xxx.xxx.xxx.xxx] DIGEST-MD5 [SASL(-17): One time use of a plaintext password 
will enable requested mechanism for user: no secret in database]

Now we changed nothing, just did a rpm upgrade, version 2.3.7 was running 
fine.  The sync server is able to login and keep things updated.

Any ideas ?

Thanks,
Roberto