Yeah, I've struggled with how to describe navigation with few words. I've used > for this in the past as well but it's not universal. But in this case, I should have figured what 6string was talking about. duh. And you are right; I should've given my config: MBP 2.8, 4GB, 10.5.8
Anyway, nothing was listed in login items but iTunes and Logitech helpers. They've been there a long time and should not be involved with this odd menu bar icon. Also, here's part of com.apple.systemuiserver.plist that applies:
<key>menuExtras</key>
<array>
<string>/System/Library/CoreServices/Menu Extras/Displays.menu</string>
<string>/System/Library/CoreServices/Menu Extras/Bluetooth.menu</string>
<string>/System/Library/CoreServices/Menu Extras/AirPort.menu</string>
<string>/System/Library/CoreServices/Menu Extras/Volume.menu</string>
<string>/System/Library/CoreServices/Menu Extras/Battery.menu</string>
<string>/System/Library/CoreServices/Menu Extras/TextInput.menu</string>
<string>/System/Library/CoreServices/Menu Extras/Clock.menu</string>
<string>/System/Library/CoreServices/Menu Extras/User.menu</string>
</array>
It just mentions whatever is to the right of the strange icon and what I would expect to find.