The Beta1 of DolphinHD 5.0 is now public.
I found a place where they changed something and my plugin crashed as a method being called no longer existed.
A version that catches this error is currently being signed by Dolphin Labs and will be in the market soon.
Good news: DolphinHD 5.0 supports subfolders for bookmarks.
No code-change on my side was required as the API was designed to support this from the very start.
I hope this also solves the old duplicated bookmark -issue. :/