exception handling and reporting

Is there a way to get more verbose messages from the XSLTProcessor?

Right now, when I have a syntax error or such in my xsl sheet, all I
get is an exception when I execute the importStylesheet method.

I'm catching the exception with a try/catch and reporting with the
name, message, and stack properties of the thrown exception, and here's
what I get:

exception.name: exception.message (stack: exception.stack)
null: Component returned failure code: 0x80600001
[nsIXSLTProcessor.importStylesheet] (stack: undefined)

as you'll see, this doesn't even give me the line number or script file
the exception was thrown in.  Since this is a slightly more complicated
object, are there different properties I should be using to get the
information I need? (a description on why parsing failed would be nice,
but a line number and script file at the very *very* least would be
awesome.

I apologize if this is a FAQ, or if it's answered in TFM, all the
searching I have done has come up with nothing (the XSLTProcessor
doesn't seem to be overly well documented, maybe with my work using it
I can fix that :), so a pointer to the place in TFM or a pointer to a
google search is very welcome :)

Thanks!

-Jeremy