Sandboxed site now shows 0 backlinks

anyone else experiencing this?

[oldskool79]

I have a PR7 site that was apparently sandboxed about 2 months ago. This site had ~20,000 indexed pages of unique content and ranked well for many terms.

About 2 months ago, my positions in the SERPS dropped dramatically. Most terms where I was in the top 5 for now show up on page 10 or later.

Today I checked the backlinks in Google and it now shows zero backlinks. Yahoo shows 129 backlinks, with several .edu sites, the Yahoo directory, ZDNet, etc.

I know Google doesn't show *all* backlinks - but now it is showing none. There is no way that Google doesn't have at least some of these links in it's index.

Has anyone else noticed this for sites that have been 'sandboxed'?