Original comment by @monfera:

1. Hover activation of content while layout interaction is ongoing:

2. I couldn't reproduce it yet, but saw it once, apparently some partially missing borders:
   

3. The entire browser page overscrolls when overscrolling the table (on OS X and likely, iOS) - it's generally intentional, but might not be the ideal thing for this type of application (might be better for reports or notebooks of unconstrained length etc.)