Display bug: word at end of line is not displayed

In the 2012-02-26 19:48 revision of this answer the word "only" is erroneously not displayed at the end of the first line in the case $\rm\:n > 1$, in IE 8.9.7601.17514, see screen grab below.

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Shows up on Firefox 9.0.1. –  Arturo Magidin Feb 27 '12 at 2:53
No issue with Chrome 17.0.963.56 either. –  Alex Becker Feb 28 '12 at 3:43
Also OK in Safari 5.1.2. Safari has its own display bugs related to MathJax here, though. –  GEdgar Feb 28 '12 at 16:02
FYI, I'm going to rollback to your stated revision for a minute to test in IE8. –  Jarrod Dixon Feb 29 '12 at 4:54