I'd be willing to bet this is an issue WU is already aware of but it might be worth sending them a note with your log.
Thanks Felix, I had not thought to email them. I have now done that.
Just to clarify: this is the upload to your website, correct?
At first, that is what I assumed, but the webcam image on my website is updating just fine.
Are you certain this isn't the Weather Underground webcam upload? I've been having random episodes of FTP upload errors at 10 minutes intervals. The only thing I upload at 10 minute intervals is the webcam image to Weather Underground.
Edouard (and all of you), just out of curiosity, what do you have your Main FTP time set to in
WeatherCat | Preferences | On-Line | Update Web Pages Every?
This was happening to me a while back it took WU 3 days to respond they said they were having server problems which only effects certain areas so the server that you re on might have been the problem
Good to know. Thanks.
Although WU shows the last webcam was uploaded just a few minutes ago (6:32 CDT), I do hove the same FTP errors (67, 910, and 911) just 10 minutes earlier.
Looks like Felix, Alan, Edouard, and Randal are correct. It's not WC or your ISP that are failing, it's WU. WU's servers may just be over-load at various times.
At least WU is now showing a mini-webcam image of my station on their map. 
BTW, I assume you are getting an email alert from WC about these errors? Or do you just not have anything more exciting to read than Console logs!
![Lol [lol]](https://athena.trixology.com/Smileys/default/lol-1.gif)
Now that I know that some of the rest of you are seeing these same errors, I am feeling better. I had just changed the provisioning of my Internet speed with my ISP and those errors started up the next day, so I assumed the problem was on my end. It looks now like this appears to be a WU thing. Sometimes when I pull up my WU site, it shows my webcam is unavailable and a few minutes later, it shows up fine.
I have not received any email from WU; I'm just memorizing all the arcane stuff as I watch the console log scroll by.
I'll keep my eye on this for a few days and see what happens.
Everyone: Thanks so much for responding. WeatherCatters are the best!