As of now (11 May 2006) the default verse chooser in PalmBible+ only goes up to verse 219. This means that several of Philo's works (which have more than 219 sections) are difficult to navigate. The verses are there, but one must scroll to them. Many thanks to Jérôme Moreau for pointing this out. I've posted a message to the PalmBible+ forum. Hopefully the default verse chooser can be fixed for future use.
In the meantime, you can turn on the "Old Chapter/Verse Selector" by going to Options | Preferences | Navigation in the PB+ menu, and then check the box next to "Old Chapter/Verse Selector."