Yup, 700 lines is far too much to post, but I'll bet you can cut out 1/2 those lines without affecting the bug. The trick is finding the lines that can be removed. Oh, and when you done the first pass and removed 1/2 the lines, do it again and keep doing it until there are no more lines to remove without the bug disappearing!

It's called a binary search and is useful for more than just searching data. ;)