You sure its not a slow server, If it is intermittent it might explain itOK. Maybe it has something to do with cut and pasting into posts?
I replied twice on the forum, then went to the above thread and got the error.
I also see no avatar for the original poster.
Forum looks OK.
Click on post above and now the page is not loading the CSS.
View attachment 10055
I had the same symptoms for a short while due to a high server load