"This looks like an issue with how the data is displayed in Webmaster Tools, it shouldn't affect your site's crawling, indexing or ranking. I don't have any specifics at the moment, but the team is looking into the details to see what we can do here. Thanks for your patience & sorry for the confusion!"
"Some Webmaster Tools users have reported missing data in the "Links to your site" section. We are aware of this issue and are looking into it; you do not need to take any action. We hope to have the normal data shown again in the near future. The data shown there is informational and does not affect your site's crawling, indexing or ranking."
Fixed the issue with the Google webmaster tools in [links to your site], is again see the backlinks normally.