RC4 delay on clicks?

I’m trying the new RC4, and I noticed a delay of 2-3 seconds when I click an action link / linkTo helper, and I see no evident reason why. Getting back to RC3 works fine.

Anyone else experienced this strange behavior, or has an idea why?

Probably has to do with the debug flag being left on, they released a temporary build on the release page. Link to release page

Yes that was it, thanks for the hint. The announcement now put on that page explains why.