USB Descriptor error message on booting

[RDB]

Hello,
I just recently installed Fedora 10. On booting, I see the error messages 
regarding USB port below. This makes the boot process really slow, at it seems 
to get delayed for every one of those message.

I tried plugging in my USB stick after I logged in to KDE and it seems to 
work. I also have Creative Webcam on USB (which I haven't tried). In any case, 
what are these messages ? 

(These are taken from "dmesg", but they are the same messages I saw when 
booting. I can send the complete output of "dmesg" if necessary).

Thanks for any help
RDB

..
input: ImPS/2 Generic Wheel Mouse as 
/devices/platform/i8042/serio1/input/input4
usb 1-6: device descriptor read/64, error -110
usb 1-6: device descriptor read/64, error -110
usb 1-6: new high speed USB device using ehci_hcd and address 4
usb 1-6: device descriptor read/64, error -110
usb 1-6: device descriptor read/64, error -110
usb 1-6: new high speed USB device using ehci_hcd and address 5
usb 1-6: device not accepting address 5, error -110
usb 1-6: new high speed USB device using ehci_hcd and address 6
usb 1-6: device not accepting address 6, error -110
hub 1-0:1.0: unable to enumerate USB device on port 6
usb 3-2: new full speed USB device using uhci_hcd and address 2
usb 3-2: configuration #1 chosen from 1 choice
usb 3-2: New USB device found, idVendor=041e, idProduct=4034
usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 3-2: Product: WebCam Instant 
usb 3-2: Manufacturer: Creative Labs  
usb 4-2: new full speed USB device using uhci_hcd and address 2
usb 4-2: device descriptor read/64, error -110
usb 4-2: device descriptor read/64, error -110
usb 4-2: new full speed USB device using uhci_hcd and address 3
usb 4-2: device descriptor read/64, error -110
usb 4-2: device descriptor read/64, error -110
usb 4-2: new full speed USB device using uhci_hcd and address 4
usb 4-2: device not accepting address 4, error -110
usb 4-2: new full speed USB device using uhci_hcd and address 5
usb 4-2: device not accepting address 5, error -110
hub 4-0:1.0: unable to enumerate USB device on port 2
usbcore: registered new interface driver hiddev
usbcore: registered new interface driver usbhid
usbhid: v2.6:USB HID core driver
nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Plase use
nf_conntrack.acct=1 kernel paramater, acct=1 nf_conntrack module option or
sysctl net.netfilter.nf_conntrack_acct=1 to enable it.
ip_tables: (C) 2000-2006 Netfilter Core Team
TCP cubic registered
....