Just like in post: http://answers.websitex5.com/post/2017 I`m understanding Claudio, but it is not the best solution to just fix the Text line spacing & to not give the freedom to the web-designers.

Look at this site! So, no problem with compatibility between browsers for WebsiteX5?

Here everywhere You made spacing smaller between the lines of the text.

And this is correct, because it helps to economy space on the Web Page and make text easier to read.

IDEA:

Give the FREEDOM to Your clients!