[NightStar76]

I bought an epub from Barnes and Nobles that I really wanted. When I downloaded it, though, every letter is clinging resolutely to the left-hand side of the screen, making it unreadable on my Nook! I wanted to open it in Sigil to take a look so I could send a note to the publisher, but this is the error I get:

Error info: Cannot load file D:\Calibre\Hearn_ Lafcadio\The Works of Lafcadio Hearn_ Eleven Book (6580)\The Works of Lafcadio Hearn_ Eleven Book - Hearn_ Lafcadio.epub: C:\b\s\Sigil-0.4.2-Code\src\Sigil\Importers\ImportOEBPS.cpp(351): Throw in function class QString __thiscall ImportOEBPS::GetNCXId(void)
Dynamic exception type: class boost::exception_detail::clone_impl<struct ErrorParsingOpf>
std::exception::what: Unknown exception
[struct column_number *] = 174
[struct error_string *] = Namespace prefix 'opf' not declared
[struct line_number *] = 3

Sigil version: 0.4.2
Runtime Qt: 4.7.3
Compiled Qt: 4.7.3
Platform: Windows SysInfo ID 144