Known bug, though I have to say that I haven't noticed the difference.

This doesn't jive with what I've seen and what I know. Are you sure it's not just the darker theme throwing you off? Now, it is true that it doesn't get as dark, but it nots definitely not less bright.

MicroB isn't as good with scrolling as Opera. My recommendation would be to either turn snav off and change the d-pad to scrolling-only.

The good news is that it's only temporary, scrolling will get better.