One point I'd like to make here is I often see people post both here and on Google Sitemaps forum that
"I have tons of incoming links from other sites!"
Well, let's take a look at those "links", and whetehr they are helping you, or in 100% of the time, we see they are hurting you.
But the problem is, what kind of neighborhood are these incoming links to your site coming from? Would you use Timothy McVie as as a reference for your resume for example?
On Google Sitemaps forum where they do allow you to post your site, I have checked numerous web sites from people with this same problem and 100% of the time you find each page which they claim to be Supplemental, might only have a couple of links coming in from obvious loser sites, often PR=0, often Supplemental themselves.
Add to the that the fact that even thought they all claim "I'm doing everything right, I'm not violating Googles rules!" When you look at their site, it's so cheezy, the layout stinks, and there's Adwords all over the place, no human editor would spend more than 5 seconds on the page before rejecting it.
I think Google has been clamping down on links from all these loser sites recently, and as they make more pages Supplemental in the index, they probably don't trust any links coming from a Supplemental page, so bottom line is you probably don't want incoming links from Supplemental pages of other web sites.
Thgis is why I do NOT do cross linking even though web sites ask me daily! Furthermore, many webmnasters are scum and show you that they link to your site, but then use a nofollow tag in the HTML code.
Rather you want links coming from high PR pages from authority sites with REAL CONTENT, .ORG sites, .EDU sites, .GOV sites, which are much higher quality incoming links from a scraper site, or SERP page, or a cheezy looking site.
One link of a higher quality type can be better than 50 links combined from Supplemental pages, which I try to avoid whenever possible.
Try doing other searches in Google such as link:, allinurl:, inanchor:, and see what other sites are linking to you.
We found over 90,000 of them a month ago, mostly scraper and bogus SERP pages, some doing 302 redirects on your incoming links, to try to make you look like a black hat SEO.
Welcome to the party!