I have Windows 7 x64 SP1 on a Sandy Bridge Core i5. Dropbox is visible only on my User Account, not on Admin. I use the "Classic" desktop so I can customise to my preferences rather than Microsoft's. The taskbar is a very pale blue/grey colour.
Some time ago, after an update, the tray icon became "invisible", a white box with faint grey outline. It is not unuseable, merely highly annoying.
systray
I have discovered three preferences at C:\Program Files (x86)\Dropbox\Client\168.4.4802\images\03_Tray_Icon\win\dark, \legacy and \light, but there is no way I can see to adjust the preference to suit my desktop.
Do I need to completely uninstall and re-install Dropbox? Or can a preference be placed in the User Preferences in the System Tray pop-up?