[TYPO3-project-seminars] Multiple registrations when double-clicking submit-button

[Mikkel Hastrup]

Hi there fellow Seminars-users,

Using the latest Seminars-release (0.8.3)  on a Typo3 site (4.2.8), I've 
discovered that if the customers are clicking the submit-button on their 
event-registration (in the front-end) multiple times before the 
following submit-page is loaded, it will generate multiple registrations 
on the same event, and also send out multiple confirmation and 
administrator-mails. This is browser-independent afaik, I noticed this 
both on Firefox 3.5 and in Internet Explorer 7.

Is there a typoscript-setting to prevent this, since some customers are 
afraid that they've doublebooked or is this actually a bug?

Best regards,
Mikkel