Oops another issue.
I downloaded a Gutenberg .html and created a .epub using calibre via my GuteBook program and the resulting .epub fails to continue/open when the Add screen is invoked in v1.3.4. It does open at the Add screen properly in v1.3.2.
Is it coded improperly? The underlying .html is straight from Project Gutenberg etext #22381.
I attach that troublesome .epub below for your perusal.