Hi guys,
As I suspected, the problem occurs because of the width css attribute of the .EventDay class, located in fixedblue.css (line 35 of Darnell's stylesheet).
Removing this width specification remedies the error and does not seem to cause any noticeable side effects on Darnell's page. While this will probably serve as a stopgap measure to those experiencing this problem, more testing is probably warranted to make sure that this attribute isn't required in other scenarios.
Darnell: I appreciate your reproducing the error so I could finally track down the problem!
Brandon