Steve is almost correct. We do support buttons with a mailto action where the intent is to send the entire PDF file as well as submit buttons created in Adobe Forms Central. That's a pretty limited support for buttons, so we hope to get to adding more actions in the future. As for the missing Euro sign, issues like this are usually because of poorly generated PDF's (e.g. missing embedded fonts). The desktop Readers have access to a number of local fonts that the mobile Readers do not. So, sometimes the desktop can display text that the mobile Reader cannot. The best solution is to completely embed (subsetted) fonts for the document. If you have a sample you can share with me I'll have a look to be sure.