To some publishers’ chagrin, Twitter is testing a feature that turns on Apple’s “Reader” mode by default on every link opened in its in-app browser. “While the new feature can be a boon for those navigating badly designed web-pages, it also manages to mangle the presentation of almost as many sites,” The Guardian reports. “While the feature works well for traditional news articles, anything that isn’t a chunk of text-heavy content in the middle of a page falls apart.”