This version of DHTML Menu has been rewritten to use the theme_registy_alter hook, allowing it to hijack the themable functions of the Menu API rather than adding preprocessing functions for the blocks.
The module is much more flexible with this approach, which means that DHTML Menu now works with Book Navigation.
Works with the alpha1 release of Public Bookings. Note that neither module has been tested from a clean install yet, so there is a chance of table schema discrepancies that haven't been caught.
Be sure to install the Date API patches listed in README.txt.