[trunk] Inivisible text is not 'grayed'

Setup: MuseScore trunk rev. 4145 both under Win XP (Qt SDK 10.04, Qt lib 4.7.0) and under Ubuntu 9.10 (Qt SDK 10.02, Qt lib 4.6.2)

Steps:
1) load or create a score whatever;
2) make sure that option "Dislplay | Show invisible" is checked;
2) create a staff text;
3) mark it as invisible.

Result: The text is shown with its own colour , not as a gray text.

Note: The text is properly hidden if option "Dislplay | Show invisible" is NOT checked; it is also properly NOT shown in generated .PDF.