InDesign (and other aps) won't allow PS to save file linked image

Question

I frequently get the message "can't save the  file because the file was left open/or it is in use" in Photoshop CS4. I originally posted this in the PS forum, but a moderator told me it should be posted here, because, as he says, "the OTHER application is keeping the file open when it should not be, and the OTHER application is preventing Photoshop from saving to the file".
The situation goes like this: I option-click on an image in ID CS4 to open  it in PS CS4, and after I've edited it and attempt to save it, the above message pops up. However, it doesn't usually happen on the first option-click in ID, but rather after I've gone back to ID where it automatically updates the image, and I option-click on it for the 2nd or 3rd time. In Q7, its even worse—even if I delete the image and save the file, or if I close the related document—I still get the PS message. I have to quit Q7 to resolve the problem.
I work on full color images in the publishing field, with relatively large layered PS files which frequently need to be changed. Going back and forth between ID, Q7 and PS using their respective clicking on the image options expedites the design process. With not being able to save in PS for images linked to page layout applications, I am losing the ability to multitask in this area.
Also, what makes this "bug" so perplexing is that it doesn't always happen. For instance, yesterday while working in a file, I couldn't save ANY image in PS linked to the page layout app without quitting that app first. Later in the day, the problem disappeared, and I didn't have to quit the file. I have no idea what I did that caused it to "fix itself".
Anyone aware of any patch or practical workaround to this?

Answer 1

This message is a reply to the first "Spiers" reply to my post, not the one referring to Windows.
Which widget are you referring to? The mini icons to the right of my forum ID at the top are New, Your Stuff, History and Browse. None of these offer anywhere to go related to my post. They just dump you in another random area of the forums or to your own post or account history.
However, there is to the right, a sidebar that reads: "More Like This" which offers links to posts that DO relate to my problem. But, they DO NOT offer a solution. You, like the moderator in the PS forum, are basically telling me the same thing: Please take your issue somewhere else.
Why can't I get a direct answer, maybe like "Abobe is aware of the problem and is working on a patch" or "as obvious that it appears to be a CS issue, the problem is actually with OS X, etc." Don't give me the bum's rush.