MBP will not boot up with USB devices connected

I have a late 2010 MBP 15 10.7.2 that will no longer boot up if any USB devices are attached. A dongle, a hub, anything. It goes to the gray screen and stays there. Disconnecting all USB devices the MBP will boot up. Then connecting the USB devices they work. It just will not boot up with anything connected to the USB ports. I have reset PRAM, SMC and fixed disk permissions. Made sure login items are ok, and start up disk is correct. I cant really say when the problem started as it worked fine before, maybe on 10.7.1? Not sure.
Any suggestions for a fix?

I re-installed the 10.7.2 combo. It booted up with a non powered usb 4 port hub but it disabled it. Plugging it out then in again and it works. Looks like the USB firmware has changed somehow in 10.7.2, The hub works on PC's at work no problem, and it worked on the MBP without issue previously. Its not just the non powered hub its a powered hub, and other devices.
Any solutions?

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It happens on reboot and a fresh start whenever something is plugged into either of these two USB ports. I've let the gray screen sit overnight, just to see if it would enter the Login Panel. Didn't happen.
As soon as I unplug the USB item, the HD whirls up and a few seconds later the booting continues as normal. I have booted in verbose mode just to see what the system says. It stays on the gray screen, again, until I unplug the USB device. However, the screen does note the following:
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........AND BEFORE ANYONE SUGGESTS IT, YES I HAVE ZAPPED THE PRAM and reinstalled the OS from new MBP Install Disks from scratch! Still occurs.
Hope someone can also validate what I've wrote with the newer MBP, as well.
Many Thanks!

JKosh wrote:
MBP hangs on the initial Gray Screen when anything is plugged into either of my MBP's USB ports on boot and reboot. I've tried it with a USB mouse, USB2 Hard Drive, USB Memory Stick and USB RF Mouse. It DOES NOT happen when anything is plugged into the Firewire 800 port, only either USB port.
It happens on reboot and a fresh start whenever something is plugged into either of these two USB ports. I've let the gray screen sit overnight, just to see if it would enter the Login Panel. Didn't happen.
As soon as I unplug the USB item, the HD whirls up and a few seconds later the booting continues as normal. I have booted in verbose mode just to see what the system says. It stays on the gray screen, again, until I unplug the USB device. However, the screen does note the following:
I'm having exactly the same problem with my MacBook Pro.
It's either the usb hub or simply the iphone... every time I need to boot my macbook pro I have to disconnect every device. It's getting quite annoying.
The previous 17" Powerbook G4 had no issues.

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Do you have that problem when running in the Firefox SafeMode? <br />
[http://support.mozilla.com/en-US/kb/Safe+Mode] <br />
''Don't select anything right now, just use "Continue in SafeMode."''
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once they are disconnected, its all fine, will boot right thru to windows, where I can just plug em back in
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Quote
****SLOW BOOT-UP in POST SCREEN****
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MBP will not boot up with USB devices connected

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