Today, I upgraded my blog to WordPress 2.7, and while most of the upgrade went smoothly, I did notice that my Twitter plugin wasn’t showing new tweets anymore. I initially thought maybe it was a caching issue, or I had run out of API calls or something, but I returned hours later to find it in the same state. I tweaked with the function call to see if changing it would refresh the cache but nothing I tried made it work. I looked for...