Photivo 2014-05-25 from rapps does not hide the taskbar when invoking fullscreen via F11

0.4.12-RC-50-geb1a43d gcc dbg lin is affected
VBox4.3.40, VBEMP, 800x600 32bpp desktop resolution

reproduction steps

• install Photivo 2014-05-25 and start up the app
• hit F11 key

expected result
The app does switch into fullscreen and hides the taskbar
2k3sp2_ok.png

observed result
The app does switch into fullscreen but the taskbar remains visible erroneously.
Ros does log nothing, therefore I omitted the logfile
0.4.12-RC-50-geb1a43d_photivo_affected.png

The bug has not recently been introduced, I noticed it the first time when testing that app in ros 0.4.9RC35.