scott1137 - 5:26 pm on Jul 6, 2011 (gmt 0)

OK, answered my Q (it helps to write it out):
Turned on SEF at global config to get 404 instead of redirect.

Here's LHH readout:
http://www.helptherapist.com/about-mainmenu-35

GET /about-mainmenu-35 HTTP/1.1
Host: www.helptherapist.com
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20100101 Firefox/5.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip, deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Cookie: 18dd4d64515d56106c4171c7bd561f9f=941dc302a0bf0b84c4c84c06a7b4d785; __utma=125776147.476053122.1309971146.1309971146.1309971146.1; __utmb=125776147.5.10.1309971146; __utmc=125776147; __utmz=125776147.1309971146.1.1.utmcsr=helptherapist.com|utmccn=(referral)|utmcmd=referral|utmcct=/
DNT: 1
Connection: keep-alive

HTTP/1.1 404 Not Found
Date: Wed, 06 Jul 2011 16:56:10 GMT
Server: Apache/2.0.52
Content-Length: 215
Connection: close
Content-Type: text/html; charset=iso-8859-1


I've checked url in backend via mainmenu and article manager and all looks correct.