Users to PubMed may have noticed some changes to the overall layout of the database and some of its functionality over the past 6 months. For example, icons that indicated availability of abstracts and free full text have been removed. Further information can be found by following the link below or by checking the NLM Technical Bulletin.
http://www.nlm.nih.gov/pubs/techbull/nd08/nd08_pm_new_summary.html