just a few days ago i had around 100 backlinks from 30 or so sites. now it's saying no data available? anyone experiencing this same problem, or is it just me? :\
There seems to be issues with it or they are on purpose just showing very few links. A few days ago I had 19 000 backlinks according to webmaster tools, now it says I have 13. If anything the backlinks have increased in the past few days. I checked another site I have and it says 9500 total links, however, when clicking "more" it just shows 20 or so links so something is definitely messed up.
Google's link tracking is somewhat suspect. I tend not to take much notice of this anymore as it doesnt often affect my sites rankings so I just spend my time gaining more backlinks instead of worrying what google is choosing to show me. Obviously this is more of a problem if you are using the stats to show to a client. Yahoo siteexplorer is a better gauge of how your link efforts are going.