Hi ForceHSS,
Thanks for the prompt reply. No, they are using the standard BB codes such as [img] and [URL] etc.
We run a reptile forum and every now and then users post threads of field trips they have taken along with a fair few images of the landscapes & animals & they encountered on the way. They have been able to do this without issues for years by either hosting their own images on their server or, via Flickr. But now, as soon as you try to make a post with 3 or more BB codes, you get the blank page and 403.shtml error...
Even if I (admin account) try to create a post with multiple lines of [URL] (example below), I am unable to post it and experience the error.
[
*URL="http://www.domain.com"]Link Name[
*/URL]
* added so that the link doesn't parse
The BB codes definitely work, as there is no issue if you place 1-2x codes within the one post. And I have gone through the admin panel and BB codes are definitely on, nothing has been changed there.
Any ideas?
Cheers, Sam.