Steps to Reproduce:

1. Add some text to a page ("abc").

2. Click 'Save'.

3. Think, "Oops, I forgot to add…"

4. Click the cancel button on the Save dialog.

5. Go add the other text ("xyz") (or add or change images, templates, refs, or remove the abc text that you typed earlier; it doesn't matter what changes you make).

6. Save the page.

7. Where's the "xyz" text I just added?!

Actual Results:
This is a "lose most of your work" bug:

Everything you do after cancelling the first time is irretrievably lost, and unless you just happen to Review Changes before saving, you won't know that you're going to lose everything until it's too late to copy it to another page.

Reproducible: Always

Reported in Safari 7.1 on OS X 10.9.4; confirmed in Safari 6.1.4 and Firefox 30 on Mac OS 10.8.5

Version: unspecified
Severity: critical