Cannot save changes to content.opf of random epubs

[GoogleCodeExporter]

Please read http://code.google.com/p/sigil/wiki/ReportingIssues for
information about submitting a good bug report.

What steps will reproduce the problem?
1.
2.
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...

What is the expected output? What do you see instead?

What version of the product are you using? On what operating system?

I am sorry but I don't know how to answer some of the questions. I can't say 
how to reproduce this unless I give you the same epub file I try to change. I 
try to save changes to <dc:title> but it drops an error with these details

Error info: Cannot save file H:\Sony_Reader\media\books\06 Los mercenarios - 02 
La promesa del rey brujo.epub: 
C:\build\Sigil-0.7.3-Code\src\Sigil\Exporters\ExportEPUB.cpp(236): Throw in 
function void __thiscall ExportEPUB::SaveFolderAsEpubToLocation(const class 
QString &,const class QString &)
Dynamic exception type: class boost::exception_detail::clone_impl<struct 
CannotWriteFile>
std::exception::what: Unknown exception
[struct file_fullpath *] = H:\Sony_Reader\media\books\06 Los mercenarios - 02 
La promesa del rey brujo.epub

Sigil version: 0.7.3
Runtime Qt: 5.1.0
Compiled Qt: 5.1.0
Platform: Windows SysInfo ID 144

The book I try to edit is this one: 
https://mega.co.nz/#!UJJF0Q7Q!YfeCFEGcaLJAhVJ0xAGn_2nESwlNH31WaVycA7qAd5g

Sorry for not being able to fill up a proper report, but hope it still somewhat 
helps

Original issue reported on code.google.com by Alfonso....@gmail.com on 22 Aug 2013 at 11:31

[GoogleCodeExporter]

Forgot to say, I change nothing except for <dc:title>, inside "content.opf".

Original comment by Alfonso....@gmail.com on 22 Aug 2013 at 11:33

[GoogleCodeExporter]

http://code.google.com/p/sigil/issues/detail?id=1782

Original comment by justin.a...@gmail.com on 23 Aug 2013 at 3:08

[GoogleCodeExporter]

Go to that link. Turns out all it is is the file being marked as read only.

Original comment by justin.a...@gmail.com on 23 Aug 2013 at 3:10

[GoogleCodeExporter]

Original comment by daveheil...@gmail.com on 24 Aug 2013 at 6:39

• Changed state: Invalid