Text from search results overlaps crate menu when scrolling horizontally

[jdm]

From https://doc.servo.org/servo/index.html?search=contains:

[GuillaumeGomez]

I can't reproduce this bug, either on firefox or chrome. Any additional information would be very useful in here.

[jdm]

I am using Firefox nightly with webrender enabled, so I'll see if those make a difference.