Plugging in a USB device causes everything else to stop working?

Hi there.

I have an iMac 17" Core 2 Duo 2.00Ghz with 1GB RAM. I also have the new wired aluminium keyboard.

When plugging in my printer, with a memory card in - on occasions all other USB devices stop working; this is the keyboard and anything else, such as my iPod Shuffle dock or any other peripheral.

This is really annoying, as the only way to get use of my keyboard back - is to restart the machine! I can't replug in the keyboard, or sleep the machine. Nothing works except a reboot.

I will post a copy of the log file underneath - I tried to google for this, but didn't come out with any results. Please help! This is such an annoying thing! Thanks!

P.S - Sorry if I have pasted too much info underneath, just trying to be as helpful as possible!!

LOG FILE:
Oct 17 23:20:05 dans-iMac kernel[0]: SMC::setPowerState ERROR: smcPublishSleepCause failed (kSMCKeyNotFound)
Oct 17 23:20:05 dans-iMac kernel[0]: AppleYukon - en0 link active, 100-Mbit, full duplex, symmetric flow control enabled
Oct 17 23:20:05 dans-iMac natd[335]: failed to write packet back (Network is down)
Oct 17 23:20:07 dans-iMac bootpd[1223]: interface en0: ip 192.168.1.12 mask 255.255.255.0
Oct 17 23:20:07 dans-iMac bootpd[1223]: interface en1: ip 10.0.2.1 mask 255.255.255.0
Oct 17 23:20:08 dans-iMac kernel[0]: USBF: 51059.213 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:20:08 dans-iMac mDNSResponder: Repeated transitions for interface en0 (192.168.1.12); delaying packets by 5 seconds
Oct 17 23:20:08 dans-iMac mDNSResponder: Repeated transitions for interface en1 (10.0.2.1); delaying packets by 5 seconds
Oct 17 23:20:14 dans-iMac kernel[0]: USBF: 51065.213 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:20:20 dans-iMac kernel[0]: USBF: 51071.213 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:20:26 dans-iMac kernel[0]: USBF: 51077.214 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:20:32 dans-iMac kernel[0]: USBF: 51083.214 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:20:39 dans-iMac kernel[0]: USBF: 51090.214 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:20:39 dans-iMac kernel[0]: AFPSleepWakeHandler: waking up
Oct 17 23:20:45 dans-iMac kernel[0]: USBF: 51096.214 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:20:51 dans-iMac kernel[0]: USBF: 51102.214 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:20:57 dans-iMac kernel[0]: USBF: 51108.214 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:21:03 dans-iMac kernel[0]: USBF: 51114.215 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:21:09 dans-iMac kernel[0]: USBF: 51120.215 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:21:15 dans-iMac kernel[0]: USBF: 51126.215 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:21:21 dans-iMac kernel[0]: USBF: 51132.215 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:21:27 dans-iMac kernel[0]: USBF: 51138.215 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:21:33 dans-iMac kernel[0]: USBF: 51144.215 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:21:33 dans-iMac kernel[0]: disk1s1: I/O error.
Oct 17 23:21:39 dans-iMac kernel[0]: USBF: 51150.215 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:21:44 dans-iMac loginwindow[72]: sendQuitEventToApp (LastFMHelper): AESendMessage returned error -1712
Oct 17 23:21:45 dans-iMac kernel[0]: USBF: 51156.216 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:21:48 dans-iMac launchd[85]: com.logmein.logmeinguiagent: exited with exit code: 1
Oct 17 23:21:48 dans-iMac launchd[85]: com.logmein.logmeinguiagent: 9 more failures without living at least 60 seconds will cause job removal
Oct 17 23:21:52 dans-iMac kernel[0]: USBF: 51163.216 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:21:52 dans-iMac bootpd[1223]: server name dans-iMac.local
Oct 17 23:21:52 dans-iMac bootpd[1223]: DHCP DISCOVER [en1]: 1,0:d:93:ec:a0:c4
Oct 17 23:21:53 dans-iMac bootpd[1223]: DHCP DISCOVER [en1]: 1,0:d:93:ec:a0:c4
Oct 17 23:21:54 dans-iMac launchd[85]: fm.last.lastfmhelper: exited: Killed
Oct 17 23:21:55 dans-iMac ARDAgent [1235]: ******ARDAgent Launched ******
Oct 17 23:21:56 dans-iMac ARDAgent [1235]: ******ARDAgent Ready ******
Oct 17 23:21:56 dans-iMac bootpd[1223]: DHCP DISCOVER [en1]: 1,0:d:93:ec:a0:c4
Oct 17 23:21:56 dans-iMac bootpd[1223]: OFFER sent <no hostname> 10.0.2.2 pktsize 300
Oct 17 23:21:57 dans-iMac bootpd[1223]: DHCP REQUEST [en1]: 1,0:d:93:ec:a0:c4
Oct 17 23:21:57 dans-iMac bootpd[1223]: ACK sent <no hostname> 10.0.2.2 pktsize 300
Oct 17 23:21:58 dans-iMac kernel[0]: USBF: 51169.216 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:22:02 dans-iMac natd[335]: failed to write packet back (No route to host)
Oct 17 23:22:04 dans-iMac kernel[0]: USBF: 51175.216 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!
Oct 17 23:22:10 dans-iMac kernel[0]: USBF: 51181.216 AppleUSBEHCI[0x2641000]::Found a transaction past the completion deadline on bus 253, timing out!