I have been able to get a fixed version, and I have uploaded it here, so you can try to find the differences:
http://www.ngpaws.com/demos/laluz/This is the complete step list of what got me there:
1) Start developing game in the Windows version of Squiffy (64b). Everyhting working fine within the IDE, but when I built the game, accented chars were wrong.
2) Copy the code from the editor to the online editor, again everything when smooth, even the preview, but once I clicked on "publish", the final version had the accents messed up.
3) Copy the code again from the online version to the local one, just by copy/paste, not using the option to download it. I did it cause I had made some changes in the texts and I wanted to keep them in the local version. I clicked on "build" and suddenly the new version was working fine.
It seems the windows editor does work with a different encoding, and so pasting online and pasting back to Windows version fixed the problem.
Note: the new version has some texts changed, cause I've been working on it, but I'm sure you will notice soon what I mean with "messed up accented chars".