Error Message Feedback

Validating 

[I am having trouble with the W3C html validator.
The page: http://www.acmlm.org/beta/ is listed by the validator as not valid
html 4.01 strict. I believe this page to be correct though. The validator's
indication of "Line 112, column 3: end tag for element "P" which is not
open." appears to be in error. The tag IS open at that point. That line
closes it.

Please advise as to why the validator would behave incorrectly like this.]