Each file is about 89Mb. So, I am not able to mail them to you.
Each file was created via "Chapter & Verse" which joins M4Bs and adds chapter markers.
TGF 0.80 is running on a WinXP SP3 32-bit machine
TGF 0.71b2 (not sure why I thought it was 0.79) is running on a Win7 Ult 64-bit
The original file is: http://rapidshare.com/files/455742201/Pronto_Original.m4b
The 0.71b2 edited file is: http://rapidshare.com/files/455750180/Pronto_TGF_071b2.m4b
The 0.80 edited file is: http://rapidshare.com/files/455753891/Pronto_TGF_080.m4b
In both cases I edited the Year tag and saved the file.
In 0.71b2 I used "Manual edit" tab
In 0.80 I used the "Full Tag edit (Ctrl-G)" right-click menu option from the "Tag" tab.
It may be that C&V is storing the image in a weird way (e.g., with the chapter markers). Just wild speculation.