Then I guess the current situation is:
 Use deb.multimedia.org if you want acroread, handbrake, ... from a repo.
This repo is managed by the former debian.multimedia.org owner that did not want to abide to the debian rules but removed the word 'debian' from his site name (changed it to deb for fear of being sued by Debian?).
 Then the owner of the multimedia.org domain sold the debian branch to the Russians? And they are not afraid of being sued by Debian.
Check your network configuration.
You are using NetworkManager, right?
Right-click on network icon, select configure network connection, select your connection, click 'Edit', click IPv4. Do you have DHCP(automatic)?
It is NetworkManager that changes your resolv.conf by adding your provider's name server(s).
The thunar package comes from the 'waldorf' repo, which has the highest priority.
To install a newer version you have to:
1. Temporarily lower the waldorf priority to that of wheezy/sid/experimental [pick one]
2. run apt-get update
3. upgrade the thunar package to the version in w/s/e
sudo apt-get install -t wheezy thunar
4. Put the thunar package on hold to prevent downgrade.
echo 'thunar hold' | sudo dpkg --set-selections
5. Raise the priority for the waldorf repo to what it was originally.
6. run apt-get update again
That should do it.
This will prevent the installation of a newer version of thunar.
If you want that, you will have to repeat the whole shebang.
[ 408.308105] usb 1-4: new high-speed USB device number 16 using ehci_hcd
[ 408.724083] usb 1-4: device not accepting address 16, error -71
[ 408.724126] hub 1-0:1.0: unable to enumerate USB device on port 4
[ 408.980077] usb 3-2: new full-speed USB device number 2 using uhci_hcd
[ 409.124144] usb 3-2: not running at top speed; connect to a high speed hub
[ 409.158141] usb 3-2: New USB device found, idVendor=148f, idProduct=3070
[ 409.158150] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 409.158156] usb 3-2: Product: 802.11 n WLAN
It is falling back from using ehci_hcd to uhci_hcd and then things work, but at a lower speed than the device is capable of.
Try the instructions I mentioned in my previous post. They disable ehci_hcd and force an immediate fallback to uhci so that the system does not go through all the testing with ehci before falling back.
The end result is the same, but you won't fill your logs with all those ehci messages.
Post output of the 'lshw' command.
IIRC it is not installed by default. Install package 'lshw' first.
And do post between [ code ] tags please.
Clearly something is wrong there.
[ 589.660076] usb 1-4: new high-speed USB device number 5 using ehci_hcd
[ 589.728420] hub 1-0:1.0: unable to enumerate USB device on port 4
[ 589.968077] usb 1-4: new high-speed USB device number 6 using ehci_hcd
[ 590.037880] hub 1-0:1.0: unable to enumerate USB device on port 4
where the device number is augmented by 1 after each try.
Is this an USB-2 or USB-3 port?
Try using other ports. Perhaps you have a combination of USB-2 and USB-3 ports.
If it does not work on any port, try instructions from this post