Thank you for the information, I’m not sure why is this happening. Can you look at the error log, it’s maybe still there. (usually error.log files in the main folder of your site)
I’m looking at the svn changelog right now, but I can’t think of anything causing that.
Is this occured only on the frontend, or on the backend as well?
Can you perhaps send a copy of the template and list the plugins you were using? I maybe can reproduce it on my local test server.
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