Square brackets in Custom Ticket Field

Hi there, beside the fact that this is a great plugin, nearly everthing works like charm. i have one thing that bothers me a bit since your last update. i am using mt_custom_fields filter on both a linux test- and a windows liveserver.
Once i load the post where the ticket ist nested, Square Brackets “[ ]“ show up in my custom fields and they only disapear after page refresh or html parsing starts ( on live server ). but when I come to this page with a smartphonbe via facebook for instance those Square Brackets “[ ]“ won’t disapear.
It’s not really a big problem, but the parentheses are also stored in the database and make reading difficult. I wonder if you know what you can do?

The page I need help with: [log in to see the link]