Bridge 2.1.1.9 stopped showing ACR edits/crops in thumb and preview

Question

Bridge has started having a new problem, intermittently but frequently, in that it will not consistently show the ACR edits when it displays thumbnails or previews.
Specific example I am looking at now. Raw Nikon D300 NEF, open in ACR, crop and adjust various settings, hit "DONE". Return to bridge, and after a couple seconds it shows the edits. All as expected.
A few minutes (or seconds or hours) later, the edits disappear from bridge, from either the preview, the thumbnail, or (usually) both, and the display reverts to the original NEF.
If I open it again in ACR the edits are there, remembered, correct.
Stranger still, if I scroll the thumbnails so that the selected image is not visible, then scroll back, for about 2 seconds the correct edited, cropped thumbnail appears, then it flicks back to the unedited NEF. the preview does not change (and is wrong).
I have cleared this cache, cleared the entire cache - no impact. I have deleted the XMP and started over, it works for a bit, then may come back, or moves to some other picture (some are working correctly, some not).
It DOES show the little crop/edit symbol above the thumbnail, it is just not using it.
And it is not consistent, I have two shots in the same directory. One is showing a correct thumbnail and when I click on it then un-corrected preview. One is showing neither one correct.
Even weirder, the one with the incorrect preview, if I use the magnifier, it shows the correct version (i.e. post ACR) while the unmagnified version is the original NEF.
I've tried high-quality preview, and not.
I've tried software rendering and not.
I have rebooted and checked and all updates are applied.
This has just started happening, I have hundreds of prior D300 shots that worked fine, just the last couple of days. And it works fine for SOME shots now, just not all (I'd say about 50/50 of new shots). Except so far I have not seen it happen for any prior NEF's, just the ones I have downloaded in the last few days. And I have updated nothing on the system, at least not knowingly (Adobe stuff sometimes updates automatically, but I noticed nothing).
Any ideas?
Anyone else see similar problems?

Answer 1

Stacy,  I have found from experence that sometimes we are not seeing the same things, or understanding the same words.  So don't intend to put down your skills but try this and see if we are on the same page.  I don't have CS4, just CS3 so my pictue may be a little different.  Am using NEF from Dx40 camera.
When image opened in ACR with double click, or right click, across the bottom of the ACR screen I have the following options; save image, open image, cancel, done, no OK option.
Doing edits and clicking Done saves the edits.  Save image has option to save in different formats.
Copy one of your NEF images to a test folder.  Then go to Edit/develop settings/ clear settings.  This will delete all edits.  Delete the XMP file.  Then do an drastic edit in ACR, like changing exposrue to make it very dark, click Done.
When you go back to bridge and click on NEF image the Preview Panel should show the edits.  I can not see edits in my thumb as I use Quick thumbnails.
Waht do you see in preview window?  The original or an edited NEF?  Do you have a circle symbool in the upper right hand corner of thumb indicating an edit?