Did an upgrade to SP4 on recommendation by SW tech yesterday to try and solve another problem. Now that I have all my reports are also showing as blank on web page.
you may have another problem if you are using custom properties in reports. take a look at Custom properties missing in Report Writer about going into the custom properties editor and hunting down the update report schema button. if thats not your problem, then you may have the same question marks floating above your head like i do :/