Changes done in attached document is not saved

[GoogleCodeExporter]

What steps will reproduce the problem?
1.Attach a document (txt,doc,xls etc.)
2.open the doc
3.make changes and save

What is the expected output? What do you see instead?
The attached document is editable but the changes done are not saved.the next 
time when its opened the changes are not visible.

What version of the product are you using? On what operating system?
keepnote 0.7.8

Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 22 Jan 2014 at 10:58