I see this every so often and have not determined when it happens and when it doesn't, but I finally managed to get a screen shot. Notice that the text in the citation is truncated at the bottom and there's no scroll bar:
If I click on the "more >>" link to expand the descriptive text, then a scroll bar shows up and the citation is no longer truncated when I scroll to the bottom:
It always appears to be reproducible for that book, but not all books with long descriptive text have this problem, and not all window sizes cause the problem. For example, with this book which also has a "more >>" button when I size the Library too small to display all the descriptive text, the citation is not truncated. Maybe it's only when the citation is more than two lines worth of text???
