It is possible for a page you visit to change the setting for you, and sometimes the change will go with you when you leave. The View - Text Size puts it back easily, although it does seem a little rude to me when someone messes with my settings.

It probably happens because some webmeisters think they can fit more stuff on their server drive if they use smaller type - and then they have to change your browser so you can see it.(????)

John