+>> Yes, that's true. It would be _very_ hard to provide the user the output of latex since this is really very much. For an simple formula as \frac{1}{2} this could be 2 printed out.
+
+>>> YM 2 printed pages? Yes, I'm familar with latex's insane errors. :-)
+>>> However, IMHO, it's worth considering this and doing something. Perhaps
+>>> put the error inside some kind of box in the html so it's delimited
+>>> from the rest of the page. (Actually, ikiwiki preprocessor directives in
+>>> general could mark up their errors better.)