Flair buttons suddenly broken?

Question

For the last year or so, I've been using this link to display my combined flair https://stackexchange.com/users/flair/1144664.png

As of yesterday (?) that image link is broken and redirects to https://stackexchange.com/error?aspxerrorpath=/users/flair/1144664.png.

My Stack Overflow flair still works - https://stackoverflow.com/users/flair/1127699.png

I can see that other people's Combined Flair still works e.g. https://stackexchange.com/users/flair/1.png

According to the Flair page, my link is correct - so what's going on?

Answer 1

As mentioned by Oded here:

The flair is cached individually on each server, so whether you hit the corrupted cache depends on the server you hit. This is why some people can repro and some can't. One way or another, the caches are cleared weekly, so this will resolve itself.