Ok, It only happens so far as I am aware when I am in the backend trying to authorise a front end authors submission of an event to the calendar.
I am using the following but I don't know the SVN of the Jevents I am running, although it was downloaed yesterday. I will see if I can follow your instructions to get the latest SVN and see if I have the same problem.
* Joomla 1.5.9
* XAmpp 1.70
* J Events 1.53Alpha
* PHP 5.2.8.
* Firefox 3.0.5.
* Apache/2.2.11 (Win32) DAV/2 mod_ssl/2.2.11 OpenSSL/0.9.8i mod_autoindex_color PHP/5.2.8
* MySQL client version: 5.1.30
* PHP extension: mysql
I can't recreate this in Firefox or MSIE 7.
Which browser are you using? Are you using the latest code from Subversion? Can you give me the info in the pink box?