Hi Tommaso, Sorry to hear about the difficulties. I actually had better luck creating my own import path.
ODF -> HTML -> Run tidy on HTML -> HTML2LaTeX-> LyX This made sure that the markup coming into LyX was as clean as possible with no strange ERT or other data that couldn't be converted. I also had good luck with the conversion detailed in the article link that I sent. Again, it produced very clean input, though there were some limitations. Any thoughts on how we might make it more approachable for the casual LyX user? Cheers, Rob