Thank you both. Yep, it seems I got too excited indeed

and need to clean up more... The first thing I notice is that when there is an image, the text reflow does not happen even after removing the table; more work...
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EDIT: @Toxaris: I removed some of the scripts and changed <div style="width: 995px; float: left;"> to <div style="width: auto; reflow: left;"> . Seems to be working again for now... [I have no idea why I put directly "reflow" there but Sigil seems to have been sympathetic

] -->
LATER EDIT: nope, "reflow" is not the term to use, gave an error in calibre editor check; I changed it to "overflow:left"
@Arios: I could not find the "*,html { }" in the code. Things seem to be ok for now though; will dare to bug the thread again later if another problem arises.