[Pharo-project] Problems with Czech accented characters

Hi there, in older version of Pharo (pharo1.0-10487-BETAdev09.10.4) I was able to type Czech acc. chars (like ěščřžýáíé) without problems. But in most recent image, there is problem - instead of these characters, I see only '?'. What has changed? In the older version, there is 'Fonts' folder (none in recent version), so I suppose, that font handling is now different. Importing DejaVu Czech font into recent image doesn't help. Any suggestiions what I should do? Thanks, Martin