You're aware that the status pop-up appears as soon as you hover the mouse over the USBSR icon long enough? Might be quite short on some systems, but I wouldn't know how to set the delay. It's responding quite fast on my current system, could be around 150 - 200 msec. and maybe even less. Might be a registry setting, but I couldn't find it.

I don't know where these settings reside, but I think all the icons in the system tray (including the "hidden" icons) are set to produce some kind of message when you hover over them with the mouse.  In some cases, such as with Linkman Pro, HyperSnap, and ActiveWords, all that pops up is just an identification of the program (e.g., "Linkman Pro").  But some programs provide more information: how many new messages are in my Gmail accounts, for example, the contents of the current clip highlighted in ClipMate, or the state of my computer's battery charge ("Fully charged - 100%").  Apparently USBSR is set to have the popup appear.  I might add that I've arranged to have USBSR always visible rather than stuck in the "hidden icons" section.  However, I just tried to see what would happen if I put it in the hidden icons section instead ("show only notifications").  I did not get the same result you did, Jim.  If I hover near or over the up arrows, that does not trigger a USBSR popup message.  Only if I go into the hidden icon section and hover over or slightly to the right of the USBSR icon will the popup be triggered.

You can disable the "menu on mouse hover" in Options->Behavioiur. Look for "Device stop menu" and deselect "show menu on mouse hover above the system tray icon"... Well, in Zentimo, anyway. I'm not on my machine with USB Safely Removed installed, so can't verify that this works on it.