Since installing JoomSEF on my clients website (www.silverspoonhire.co.za), the date function has stopped working.

If you try to make a purchase, check out, it asks you for the date of delivery, date of event, date of collection - yes, you can enter all that etc, but when you try to finish the purchase, it removes the dates you have already entered and wont allow you to proceed.

How would I fix this problem now?

Hi,
Is there some custom Javascript code that validates the dates before submitting or something? If there is, check if it's being loaded correctly - if it's located in an external file, make sure the URL linking to it is correct and in absolute form (with whole path including the domain).