I've been having some odd issues with my 8924 recently and I'm putting it down to the v18 FW. Essentially, the first time the issue became apparent, I wasn't able to access websites (via WLAN or LAN) but the service connection was up and appeared fine fine. It appeared that using IP addresses would allow website access though. Windows update for example was behaving normally. I subsequently hard reset the device and re-input all the config manually. It seemed to rectify the issue until yesterday when I couldn't access certain websites but could others. IMDB for example was one I couldn't access. So I suspect the issue is with DNS?! I tried changing DNS servers but that did nothing. I'd not seen these issues before the v18 update but it could be just coincidental.
Regardless, I updated to v19 last night and will see how it behaves. Fortunately, I have a Billion 8800AXL to substitute if needs be.
One question I have, can the FW be downgraded 'easily'?
Paul