Possible GPL violation in Canyon CN-WF514 WLAN router

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Hi!

I suspect a GPL violation with the product Canyon CN-WF514 WLAN router [1].
There is a firware update file on the web [2] for it.
The file is WF514-208.zip [3] and contains a file named WF514_208.bin.
Some strings in it are :
 - WBIP  - at offset 0, is this some file format ID ?
 - webpages-6104ipc.bin , a few bytes later
 - vmlinux.bin - some more bytes later

It appears to be some archive with at least the two above files.
It is probably compressed, as ZIP-ing it does not reduce the size.

Also, running nmap -O against a running CN-WF514 guesses that it is
running linux 2.4.x|2.5.x.

Note, that there is another (older) WLAN router made by Canyon, the
CN-WF512 [4]. Its page tells, that is uses GPL software and the software
(sources) is available for download.

What should I do next ?
Analyze the FW ?
Write them a letter ?

Best regards,
David Balazic

[1] http://www.canyon-tech.com/products/show.cfm/Networking/Net/Wireless_Products_IEEE_802.11g/CN-WF514
[2]
http://www.canyon-tech.com/products/show.cfm/Networking/Net/Wireless_Products_IEEE_802.11g/CN-WF514/Down
[3] http://www.canyon-tech.com/files/Canyon/Networking/WiFi_U/CN-WF514/WF514-208.zip
[4] http://www.canyon-tech.com/products/show.cfm/Net/Wireless_Products_IEEE_802.11g/CN-WF512/