Thanks for the quick reply Matt.
As a matter of coincidence, I had a similar issue earlier in the day. It seems our provider (Site5) has just updated Apache and PHP. Played havoc with a bunch of stuff on about 20 of my controlled domains/clients.
This morning I was able to log into the Admin area, but received an error similar/identical to the one above simply trying to get into the site.
They instructed me to create a php.ini file with "memory_size = 32m"
That did the trick. Then.
But alas, this afternoon when I went in to do the above mentioned edits within Tatami, it again occured. I'm curious

how high I'm 'allowed' to set my memory_size. I've sent in another support ticket.
I'll let you know what I find out.
Enjoy the Fourth in Columbus!
Centerville fireworks for me.
Michael