I am having the same issue. When I launch FMPA 11 and go to the "Starter Solutions" menu there are no thumbnail images but only a blank placeholder and the name of the template beneath.
1) Re-installed FMPA 11
• removed ~/Library/Preferences/ (all filemaker preferences)
• removed /Applications/Filemaker Pro Advanced
2) Installed the update v11.02
I had the same problem but I solved placing the application in the Filemaker Pro Folder at the first level of the applications folder.