I was able to save the entire page using IE9. Even there though I could not choose the selected text option. Note to see the option I'm referring to in IE9 you have to choose Save page to another folder on the toolbar. There is another option for selected text - a smaller dialog - that does ask if you want to save selected text. You see this dialog when you just click on the save button.
I also noticed the IE9 version of the larger dialog also displays a preview of the web page being saved. Will this version of the dialog be available on Firefox in the future? I didn't realize the dialog was part of the plugin.
You can look at the new Chrome extension - http://www.metaproducts.com/download/mpiq.crx
It has the dialog and it saves a page content directly from Chrome. We plan to do the same extension for Firefox, Opera and Safari.
Best regards,
Andrey Filatkin
MP Staff