I wasn't going to say anything but I guess I'll have to. This mistake is quite easy to understand, if you've installed Browser Switchboard. That application creates alternate shortcut to the stock-browser and that is, as we all know, MicroB. Normally that shortcut would be only Web but now there's two of them. If you've used the new shortcut, MicroB, for a long time and re-flash the stock firmware to the device I do understand, that how someone would get it mixed up and wonder, "Where's MicroB?".

Granted though, it shares the same icon with Web so in that case, I'm quite stunned that the user did not recognize the icon. Unless there was an alternative icon used to replace MicroB, then maybe so.