Problem with WAI Site

Dear Group,
I would like to keep this within LVTF until we resolve the problem. I think
there is a very subtle technique here.

The WAI site fails at 320 CSS px. It over flows the pate. Her is how it
works. The page works with no adjustment to letter-spacing, but with 0.12em
letter spacing at 320 CSS px it fails.

The experiment was conducted as follows. I used a user stylesheet on
Chrome, Firefox and Safari.  * {letter-spacing: 0.12em !important}. I used
Stylish for Chrome and Firefox and the preferences > advanced > stylesheet
option for Safari. I tried Edge as well but it failed for other reasons, so
I've left it out.

Here is how I produced 320 CSS px (341 CSS px for Safari).

Chrome allows enlargement up to 500%. So on my iMac with 1600x900 this
gives 320 CSS px. The site fails.

Safari only gives 300% enlargement. When I lower the resolution 1024x768 I
get 341 CSS px. The site failed. (I used my Macbook Air for this last test.
the iMac is hard to set resolution smaller than 1600x900.)

Firefox gives up to 300% enlargement standard, but you can change this in
the About:Config file. I set the last 3 enlargement values to 300%, 400%,
500%. With these settings I applied 500% to my iMac at 1600x900 giving 320
CSS px. The page failed.

All three browsers failed at anything smaller than 341 CSS px. The 320
cases were worse.

The only deficient browser was Edge. It just failed to split two column
regions 300% with 1280 width.

The main finding is this. When the WAI site is given 341CSS px or less, it
fails when letter-spacing is 0.12em. The same browsers perform well on
other sites.

Alastair stated worry on this issue during our discussions. So, I think
this problem is significant. Eric is a good programmer. That means the
issue must be subtle. When we do, it will be a technique.

I want to emphasize that Eric has worked hard on this site; he is an
excellent developer, and he couldn't anticipate this issue. I don't want
this to go on the general list until we have a reason why the failure
occurred. It would be unfair to Eric.

Best to All, Wayne