If I create a blog entry where I change the date, then I get the following error messages ...

Warning: No ending delimiter '^' found in c:\websites\dracan271\dracan.co.uk\blogs\inc\_misc\_request.class.php on line 590

Warning: No ending delimiter '^' found in c:\websites\dracan271\dracan.co.uk\blogs\inc\_misc\_request.class.php on line 246
Cannot update, please correct these errors:

* Please enter a valid issue date.
* Please enter a valid time.

Any ideas what this means?

Cheers for any help,
- Dan