Today, I checked my site in webmaster tools and saw that most of my links (25.000) disappeared. Most of these links are obtained from purchasing sitewide links on high pr websites. I was expecting the number of links to go up as I bought more sitewide links recently on websites that have thousands of pages. But it seems that the opposite is happening. The important thing is that my rankings have not changed but this is alarming. Has anyone experienced this before?