I fully expect that most people are not having this problem (or I would have had many more reports like this by now), but this appears worth tracking.
I hope this is not the start of a trend, but I already have two reports that the new 54xx/64xx L2 Cache Reset extension causes system crashes. One reader claimed it caused a crash at startup (confirmed by a Conflict Catcher conflict isolation). Another (Donato Zipeto) claimed that he got freezes whenever the contents of a Finder window needed to be updated.
The latest iWatch, iPad, and MacBook rumors
What's holding up Apple's iRadio service, highlights from Tim Cook's Senate hearings, and the latest product rumors.