http://bugs.winehq.org/show_bug.cgi?id=12362
--- Comment #22 from Robert M. Muncrief rmuncrief@comcast.net 2008-04-20 19:58:07 --- Ooops, I thought this one was fixed but the Steam system tray icon still doesn't appear correctly if the bottom panel is in autohide mode and hidden. A space is created for it in the system tray, but right or left clicking over it does nothing.
However, if you hold your cursor over the panel so it's visible when Steam starts then the tray icon appears and functions correctly. And of course if the panel isn't in autohide mode the tray icon also appears correctly. So it's definitely not being loaded correctly if the panel isn't visible when Steam starts.
And by the way, I only have one panel, it's at the bottom of the screen, and it's in full auto hide mode (set by using gconf-editor and setting /apps/panel/default_setup/toplevels/bottom_panel/auto_hide_size to 0). Also, I'm using wine 0.9.60.