I did. The screaming was loud and long.
I know, mine is down 30-40%!!!
Of course, it's REALLY hard to tell with mine since my bi-weekly contribution raises it by roughly 5%.
I do have less money in it than I have put in... (As noted in another thread, I just started my 401k.... I'm REALLY happy I am investing it now, the value of everything I've put in this year and next by the time I retire... MMMmmmm, the joys of compounding....)
Of course, this is assuming the government doesn't just steal my 401K.