on both pages,the font-size is 10pt,
but on one page the font size looks obviously bigger than on the other page,
what can be the reason for this?
on both pages,the font-size is 10pt,
but on one page the font size looks obviously bigger than on the other page,
what can be the reason for this?
It's most certainly not 10pt then. Or, the page is zoomed. (View -> Zoom -> Reset, in firefox).
Note that CSS takes the most-specific selector (or the one with '!important'), so make sure you don't have something else overriding it.
The pt unit is only intended for print.
Are you sure you don't have one page defined as 'px' and the other 'pt'?
You should install web developer toolbar - it will tell you the actually font size with the 'Display element information' option in the 'information' menu.