Tonight I spent a couple hours troubleshooting a problem with my Tweetfave service and handling of links. Luckily I discovered it was a simple matter of keeping up with Twitter’s API changes. This service has been running so smoothly and the API has actually been pretty stable. I needed to dust off my PHP skills and dig in to track down and adapt to an important change. Background Tweetfave is a free service which monitors the tweets you mark as favorites (now referred to as “likes”), then sends them to you by email. Currently the system stats show over 250…