I do a lot of speed tests every day, using OOKLA and nPerf.
This morning I noticed that nPerf appears to be "down" - the top and bottom of the page display normally, but the middle section remains blank.
This is the same on all of my (Firefox, Win 10) PCs, whether or not Flash has been updated.
The (non-beta) OOKLA speed test works normally.
I'm on VF cable.
Do users with other ISPs have the same problem?