Trouble viewing scripting index page

Using Omeka 2.6.1 and Scripto 2.2. we have had an active Scripto site for a couple of years with in the last week or so I have been getting messages from users that some index page are either appearing as blank pages or getting 500 errrors. It is only happening with some index pages, not all.

Can you link to some of the pages which are throwing this error?

The main page that is having the issue: http://digitalmaine.net/projects/items/show/1507

I think it might be related to the error PHP Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 279773 bytes) in /home/digitalmaine/public_html/projects/application/libraries/Zend/Controller/Response/Abstract.php on line 588

33 megabytes is a very small memory limit. If possible you should increase PHP’s memory_limit directive to something a little more usual for serving web applications, something like 128 megabytes. If you can’t do this yourself, your server admin or hosting service can help.