See this thread in the Encore forum.
http://forums.adobe.com/message/5784959#5784959
I have asked, and do not believe that any Mavericks' users have given a thumbs up. The problem described there, that produces the Photoshop -1 error, has a workaround for some parts of the problem, but looks to me like it would be a serious pain.
Please report in that thread your assessment and any solutions (or lack thereof).