Does this ever happen to anyone else?

Yep.

It always does.

But sometimes it randomly changes style to something completely different. I often get some kind of green board with light blue background. Other people at the same time are not necessarily experiencing this.

Wow, thats a DHO 'Jhana' state I have never seen!

It has done that occasionally over the years.

Liferay 5.2.2 which this place runs on it relatively unstable in the way it handles CSS, apparently.

I haven't had it do it to me in the last 1.5 years or so. Sorry it is happening to you: no idea why it does that.

I have totally failed to figure out a way to get this place upgraded to a newer version of Liferay: it apparently is mind-bogglingly difficult and expensive: will resume that project probably in Feb, unless some kind programmer wants to step up and join the long line of people who swung and struck out, I mean figure out how to get us upgraded. Lee Moore was the last to try, but then got overwhelmed with other projects.

Daniel

Everything fine on my end now.