This is a total shot in the dark, but... Do you use font management software?
I was just recently working with Linotype FontExplorer X (v.1.2.3), experimenting with font activation. I found that de-activating a font used in a Fireworks text box would cause the text box to seemingly disappear and even cause the application to crash. However, I was able to significantly improve performance by adding Fireworks to a list of applications within the font manager, under Font Requests (within Preferences).
It'd been so long since I'd initially set up the font manager, it never occurred to me to do this. But it made a huge difference. Might be worth trying.
Looking at your question again, it sounds like you're able to copy and paste the "invisible text" into the clipboard and into a new document... so I'm a little confused why you don't take that approach.
Otherwise, have you tried saving the file as a Photoshop PSD (under File > Save As...)? Or maybe you could try File > Export... and choose "HTML and Images". Once displayed in a browser, the text could be copied and pasted into a text editor. Finally, I was going to suggest that if you were able to select the text object—though maybe that's not an option—try viewing it inside FW's text editor (under Text > Editor...).
This just happened to me too! I have a site of close to 20 pages, Fireworks crashed on me when I was saving my latest changes, and when I reopened the file all the text layers in every page except for the master page were missing!
This is about 75% of my site design, not to mention countless hours of content created by our marketing team that I can't get back.
In the document preview in the Open dialog for the Fireworks File -> Open menu option I can see the text appearing in the thumbnails, but when I open the actual file the text is nowhere to be found, and they're not visible in the page layers at all. It's like Fireworks just deleted all my text layers.
Seriously seriously hoping they are there somewhere and there's a fix to this, because unlike the post above, when I go to "Find and Replace" and enter text that should be there nothing comes up, however, when I open it in Photoshop, even though Photoshop only opens the Home Page (because it's the first page in the document) as a static png all the text is there. So it does look like the original poster said, that it's there hiding somewhere.
Any ideas as to what caused this and how to fix it? Now I'm so afraid to keep using Fireworks!
Or at the bare minimum, how can I open up all the pages so I can atleast see all the text and layouts to help me recreate the pages? Is there a way to open my Fireworks project page by page in Photoshop or some other previewing program?
Thanks so much for your help really need it! Pulling my hair out!
The same thing for me just now. Working on a multiple page file, and suddenly got a low memory error. I immediately went to save, then it hung and crashed. When I re-opened the file, about 50% of the text layers are now gone. No recovery file generated (they never work anyway.)
The way FW seems to work is that it keeps the presentation of the text cached somewhere for the purposes of previewing and generating thumbnails. But make no mistake, the text layers are gone. As soon as I click into a symbol to edit, the text disappears and the layers simply aren't there.
Because I'm well aware of FW's bugginess and constant crashing, I do save often. But still, I probably just lost 15 hours of work because I need to now go back to an earlier version and port over all of the copy, symbol by symbol. Yay.