You’ll know when you run into this. The two problems are:

  1. Running a report using the SSRS SP 2010 Integration web part will NOT work correctly when using parameters.
  2. Setting the web part’s height to fill the zone, the display gets really crazy

The temporary work-around for #1 is to make sure that, in your web.config, debug is set to false. After doing this, your parameterized reports, using the SQL Server Reporting Services Report Viewer web part in SharePoint, will work correctly.

Unfortunately, I have seen no work around for #2 other than to hard code a specific height into the web part.