go to your filters and type in part of the name for the server your trying to find, then go back to the lobby and you will see no servers...wait, may take a min or two, then eventually your servers will appear...hope this helps...worked for me
this happened to me before the big mini race..here's the fix:
there are 2 flies in your steam folder called [filename].blob. just stop steam, delete the 2 .blob files, and start steam again...it will re-download the blob files and re-configure everything. worked for me. thanks to Bram and Lee for this