[TYPO3-english] felogin not working after upgrade from 6.1 to 6.2

[Koen Van Nuffelen]

After upgrading a small website from TYPO3 6.1 to TYPO3 6.2 the felogin 
doesn't work anymore.
If you fill username and password it just looks like emptying these 
fields in the form.
It doesn't give an error message. It doesn't reload the page. After 
making a new feuser, this also remains the same.
It worked perfectly in 6.1 and we have other running 6.2 websites where 
it is working too. Compared the typoscript settings and the template 
settings, but no difference. Used the extension out of the box with 
included template. Used the same .htaccess as the working version. 
Removed other extensions and javascript files etc. No difference.
After removing the rsaauth (for testing) it reloads the page but then 
also just empties the form fields user and password. No error messages 
at all. Any hints, advice, references ... to similar topics really 
appreciated.

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