Testcase 1580: XFdesktop Settings, some issues

At "Set time to in seconds, 10, select random order After 10 seconds wallpaper changes" I am not certain whether you want the tester to check that the wallpaper on only one of the workspaces is being changed. Or does the test case imply that the tick is set to apply settings to all workspaces?
At ''Transparent' Ensure that each are applied correctly." I did not see a change when switching to transparent.
At "Change the colour(s) for each They are set correctly" I can not set the colours when Transparant is selected; the colour-pick-boxes are greyed out.
At "Right click on the desktop. The 'Applications' menu loads up a list of applications correctly" the list of applications shows up only after navigating the mouse to the aplications-menu item at the bottom of the desktop-settings-menu.
At "Change the icon size with the up and down buttons. Observe that the icons change size correctly. Check that manually entering a value also has the required effect." I needed to press enter when setting a value manually before the changes took effect.
Are the options "show tooltips at icons" and "show hidden files" missing in the testcase?