could not open main database: MySQL-Password Issue

Today I encountered the following problem:

For one user, I always got the error:

> could not open main database

even though rights were appropriate. And login worked for other users. In the 
log-file, I found:

> 1251: Client does not support authentication protocol requested by server; 
consider upgrading MySQL client

I was able to fix the problem by reseting the password in mysql to an older 
password-version:
SET PASSWORD FOR 'someuser'@'localhost' = OLD_PASSWORD('*******')

Is this a problem specific to my set-up or does refdbd fail to check what 
authentication protocol should be used?

Regards

-- 
Dominik Reusser

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