No height colors in Skyview using V3.7.1

Until yesterday I’ve been using Piaware sd card image 3.5.1 without problem as I wanted to create a new sd card (16Gb instead of 8Gb) I decided to install the latest version - 3.7.1
It works fine except the Skyview display shows all aircraft in grey instead of the colors representing height - see screenshot.
Have I installed something wrong?

Ctrl-F5 or deleting the browser cache normally fixes that.

Brilliant, that was easy - Thanks :smiley: