I'm running version 4.6b SR-2 (4.62.0.2681) . If there's Hebrew in the main text of the book, it displays a large block of white space and seems to restart a few pages later - it's hard to tell.
Hebrew does, however, work fine both in the navigation pane, and in the pop-up window that appears if you scroll the text with the mouse.
(The same texts look fine in Biblia running in Firefox.)
Any ideas? Thanks.