Hi again,
Sorry that I open so many threads, but I hope they are helpful.

I have noticed another small problem with the booking page this time:

While making test reservations (and I asked other people to test for me and the had the same issue), I get an "invalid captcha" error message, while the captcha I entered was correct.

It's not happening each time and most of the times the second attempt is working, sometimes it needs a third.

Here is my info:
Database Version 5.0.95-community
Database Collation utf8_general_ci
PHP Version 5.3.10
Web Server Apache
WebServer to PHP Interface cgi-fcgi
Joomla! Version Joomla! 2.5.4 Stable [ Ember ] 2-April-2012 14:00 GMT
Joomla! Platform Version Joomla Platform 11.4.0 Stable [ Brian Kernighan ] 03-Jan-2012 00:00 GMT

Kind Regards,
Mat

Hello, we will test component with PHP5.3.10. The latest PHP version what we use is PHP5.3.3.