I just recently found out about Sigil through this forum. I just wanted to offer a big thanks to the program developer. It made my most recent effort to to edit an epub file 10x easier than it would have been without. I understand that this is all still fairly new and in development but I did have a couple of observations.

The program has an annoying habit of when it encounters some non-fatal error it reloads the document moving the cursor to the top of the document. Sort of like a child that runs home to mamma whenever he has a boo-boo.

It is not really a flaw but it took me some getting use to that the program automatically replaces alternate character entities with the display representation (for example Greek letters) even in the code view. I guess I am just used to code remaining code.

Anyway again great work so far. I am eager for the availability of version 3.