I am pretty sure this just ended up happening today with the new build 24E5222f but the cursor is gone. When I click inside a text box, I don't see a blinking cursor. When I type, I don't see it either. I have tried several websites, none of them show the cursor. Not even this feedback site right now...
I expect normally a cursor to blink to show me where it is that my keystrokes will create an effect...
Version 0.99.131.3-rc (WebKit 621.1.2.111.4)
Sequoia (15)