lucy24 - 3:41 am on Feb 1, 2012 (gmt 0)
possibly because the page is too long
Not likely-- assuming you mean it literally. Pages get slower as they get fatter, but pieces don't just disappear.
Now, if the problem is with a function generating a string that's too long for the language it's written it... that could create havoc. Or if the page uses include files, and there's an error at some point before the line that calls the includes. But that would only affect files called after a certain point.