MAC Voice Over: Why does the screen view lag behind the voice over audio?

MAC Mac OS X 10.6.8 (10K549)
When using voice over on a MAC with DE 1.8 - most times when paging thru a pdf file/book the voice and the view are inconsistent.  When using VO -  moving to the next page with the right arrow key - the audio starts to read the next page (correct), but the display is one page behind (not correct).  For readers - especially those that have significant visual impairment  - this will not work for them.  Is this a defect - and if so - I would be very happy to re-test this feature if a new revision of DE 1.8 is provided.
I am unsure this is the correct forum to raise issues such as this one.  I am in the process of evaluating Adobe DE 1.8 - my sister is blind and I am trying to move her to a MAC with VO.  I really appreciate Adobe's effort in supporting JAWS and MAC VO - thank you on behalf of all disabled folks out there.
Below is a detailed list of steps to re-produce this audio/screen inconsistency issue.
- Install DE 1.8 and add to the dock
- Add a pdf file/book to DE 1.8.  For my issue, I am adding the "Voice Over Getting Started" guide. 
- Turn on Voice Over - Cmd+F5
- Using VO - Go to the dock and select DE and start it.  The "Last Read Book" typically is the focus for the VO cursor.  Then using VO next item (VO+right arrow) - move the VO cursor to "Library Content Table".  This is the list of books that are displayed in DE.
- Using the up/down keyboard arrows - move up and down thru the books in the content list.  At this point - you should already see that the VO audio announcing the title of a book is not synchronized with the row in the table that is displayed.  The voice is announcing a book that you selected, but the display is showing the previous book. 
- Once you hear (not see) the book you want to test with, hit <enter>.  DE will open the book and start to read using VO.  At this point the screen and audio for the first page in the book are the same. 
- Once the book has been opened by DE - Using the right arrow key navigate to the next page in the pdf/book.  Normally the right arrow key is the short cut to allow a user to move forward or backwards thru a book, one page at a time. 
- With DE and VO - what happens is that VO responds to the right arrow key and starts to read the next page.  But the screen is still showing the previous page.  Hence the screen and the VO audio are out of sync. 
- For anyone that uses MAC VO - this will prevent them from using Adobe DE 1.8.
If I am doing something incorrect - please let me know. If you need any assistance or further information regarding this issue - please email me. 
Best Regards
Mike R

hi, Mike R:
     Thanks for your information. We have tested several Mac machines, iMac and MBP (use the same version as yours). But we can't reproduce the issue. Actually working with VoiceOver is a fundamental request for our application, we did test them before releasing the build.
     We suggest you test other applications, e.g. Finder, Preview and iTunes, to make sure if VoiceOver works fine with them. Or can you please check if your VoiceOver settings are correct?  

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