Well, usually, I do everything with Google search, but that one let me dry...

I did my blog myself (not using Wordpress or other equivalent), I tested it using my NAS as web server, it was OK on all 3 browser (IE9, Firefox, Chrome)

I then uploaded it to my FAI server, then, it works well under Chrome and Firefox but not under IE9 anymore...

It is on the same PC, so no issue with different versions of IE.
I tried to save the HTML page both from my NAS and my FAI server (using File > Save as in IE), then do a diff between the files... no diff.
I then clean the history in IE, I even delete the temp files through the properties of C: drive

but I still got the problem of 2 different rendering...

Anyone has an idea of what to do???