I pasted in a huge scientific reference, with multiple authors, lots of parentheses for dosages used in their study, and an abstract. At first, it choked, but then I realized it was my fault: I just pasted from the source.
The fix: I used the button to "paste as plain text" and voila! Only a number appeared, and the whole huge footnote is down there at the bottom. Very cool. I'm donating, you've made my life much easier!