Domain anonymized sample error log: see the first entry returns 200, the next 403 on the same page.
2.139.79.51 - - [06/May/2014:08:13:23 +0000] "GET /flowers/love HTTP/1.1" 200 62
55 "http://dev.domain.com/flowers/friendship" "Mozilla/5.0 (Windows NT 6.3;
WOW64; rv:28.0) Gecko/20100101 Firefox/28.0"
2.139.79.51 - - [06/May/2014:08:13:28 +0000] "GET / HTTP/1.1" 403 134 "http://de
v.domain.com/flowers/love" "Mozilla/5.0 (Windows NT 6.3; WOW64; rv:28.0) Gec
ko/20100101 Firefox/28.0"
2.139.79.51 - - [06/May/2014:08:15:01 +0000] "GET / HTTP/1.1" 403 134 "http://de
v.domain.com/flowers/love" "Mozilla/5.0 (Windows NT 6.3; WOW64; rv:28.0) Gec
ko/20100101 Firefox/28.0"
2.139.79.51 - - [06/May/2014:08:17:31 +0000] "GET / HTTP/1.1" 403 134 "http://de
v.domain.com/flowers/love" "Mozilla/5.0 (Windows NT 6.3; WOW64; rv:28.0) Gec
ko/20100101 Firefox/28.0"
2.139.79.51 - - [06/May/2014:08:17:52 +0000] "GET / HTTP/1.1" 403 134 "http://de
v.domain.com/flowers/love" "Mozilla/5.0 (Windows NT 6.3; WOW64; rv:28.0) Gec
ko/20100101 Firefox/28.0"