When filtering by keyword and using "Edit In" with Photoshop, edited file does not show up in list

Question

When I do an "edit in" using CS5 and save it, the edited file does not show up in my LR4 preview window.
Message title was edited by: Brett N

Answer 1

There are two distinct modes by which Edit In... may first open an image into PS: as a fully pre-converted rendered file; or as an on-the-fly converted image in memory.
(When LR opens a PS-edited image a second time into PS, using "Edit Original", the former option is always used.)
In the latter case, it is ACR which does this on-the-fly conversion, working from the original image (as imported into LR) plus your subsequent LR adjustment metadata. This means ACR compatibility with LR becomes an issue - as it is not, with the pre-rendered file option.
There is a useful clue to which mode is being used:
the title of the PS document window, in the case of the on-the-fly conversion, still shows the name of the Raw file (or whatever) that you started with in LR... no file has been saved as yet, to say any different. You can Save or Save as, wherever and under whatever name, and from now on LR will look there for your edited image. Or if you close unsaved, LR has no edited image to show at all.
the title of the PS document window in the pre-rendered case, is the name of a file already saved on disk and already showing in LR. If you then saved this elsewhere, you would merely make a duplicate which LR cannot know about - and if this duplicate is the one which contains your PS work, LR will accordingly not show that. It is busy showing the content of the specific file that was passed to PS.
So, if inside CS5 your document is called something like IMG23334.dng - you can save it wherever you like. If inside CS5 your document is called something like IMG23334-edit.tif - you will have to save your changes back to that exact same file, in order for them to be seen in LR.