Strange error: cannot save jpg

Question

I have a very strange problem with a jpg image. it's an RGB thumbnail of 135 pixels x 117 pixels.
I open an existing jpg.
I paste something in the image and flatten it...
then I try to save it under a new name but it will not save and give the following error: Could not save (pathname) because of a program error.
now the strange thing is: if I do an image size to 134 x 116 pixels. (or 136 x 118) the image saves fine!
If I then resize it back to 135 x 117 pixels...it won't save anymore and the error is back.
if I don't flatten the image.. i can also save it as a jpg. If I flatten the image and try to save: the error is back.
I can save other images as jpg without any problems.
any idea what may cause this?
(I use Photoshop CC on windows 8.1)

Answer 1

I've run into the same issue here...not all the time, but when it happens, it's easily replicable as soon as I paste as a new layer then flatten. Of course, today, I can't get it to misbehave.
The only workaround I figured out was to copy the whole flattened image and create a new document, which I was then able to save.
The only thing I can think of is that my Mac is bound to an Active Directory, so it's logged in as a "mobile" account. I know this caused permissions problems in previous versions.
Here is an excerpt from /Library/Logs/generator_2.txt
Scheduling change to layer 1 of 7485
Creating change context for layer 1
Updating layer 1 ("Background") of document 7485 { id: 1, pixels: true, atRootOfChange: true }
Not deleting directory "/Volumes/2TB/Thompson/thompson1453-assets": it doesn't exist
Photoshop event: messageID: 8, name: imageChanged, parsedValue: {"version":"1.1.0","timeStamp":1390949620.706,"count":2,"id":7485,"layers":[{"id":1,"pixe ls":true}]}
Emitting Photoshop event: [ 'PHOTOSHOP-EVENT-imageChanged',
  { version: '1.1.0',
    timeStamp: 1390949620.706,
    count: 2,
    id: 7485,
    layers: [ [Object] ] } ]
Image 7485 was changed: {
    "version": "1.1.0",
    "timeStamp": 1390949620.706,
    "count": 2,
    "id": 7485,
    "layers": [
            "id": 1,
            "pixels": true