Site safety not working in Sandboxie with NIS 2010

Since upgrading to NIS 2010 I have found that Site Safety doesn't work when running either IE8 or Firefox 3.5.2 under Sandboxie. The Site Safety icon is shown in black with a question mark in it This was never a problem with NIS 2009.

Site Safety works ok if either browser is run without using Sandboxie.  Has anyone else found this problem yet?