Unable to Restore Window in 0.9.1

The Google Calendar app using Fluid 0.9.1 starts up just fine, but it won't restore to a visible window once it has been closed (but still running in the dock). However, the menu bar indicates that the program is active, giving me access to About, Preferences, etc. The only way i can see the calendar again is to ctrl-click>quit, then relaunch.

A Ta-Da list app that worked perfectly in version 0.9 exhibits the same behavior after I update to version 0.9.1.