[TYPO3-english] Re: BE Users cannot login suddenly on 4.5 LTS site

[Torben Hansen]

I once had a similar problem, that users (also newly created) could not login to TYPO3. The problem was a crashed table in the MySQL database (in my case tx_rsaauth_keys), which prevented TYPO3 from writing the private keys for the RSA Auth to the table. 

Please check your database for crashed tables and if this is the case, try to repair the table with "REPAIR TABLE" or by using PHPMyAdmin / Adminer.

Best regards
Torben