This started happening out of nowhere today. The system tray window continually shrinks from its bottom-right corner every time I open it. I can't resize the window and after 5 or 6 clicks it's so small that it's completely unusable, as none of the text or icons are displayed anymore. I tried restarting my PC, uninstalling + reinstalling Dropbox, the problem still persists. I've never had this problem with any other system tray app.
Now the only way I can see options like Pause Syncing and Preferences is by right-clicking the system tray icon. Does anyone have any idea what could be causing this?