I'm still seeing this on Version 0.99.120.1-beta (WebKit 614.1.20)
In the console I get this error:
TypeError: null is not an object (evaluating 'readabilityResult.textContent')
checkReadability — Script Element 1:3631
Global Code — Script Element 1:3648
Clicking both links takes you to the offending line of code in their mail file:
if ((readabilityResult.textContent) && (readabilityResult.textContent.length < Readability.prototype.DEFAULT_CHAR_THRESHOLD)) {
The var readabilityResult is set to null at the top of function checkReadability() which is where the offending line of code exists. So in the code between setting the var to null and attempting to evaluate it in the if statement, readabilityResult is not getting a value that would overwrite null.
