In case it matters I am using TeXnicCenter with miktex, LaTeX => PDF configuration.
If I do the following:
I get a PDF which looks fine in Adobe Reader. And when the cursor is over the image, it becomes a cross. Selecting it the image is highlighted and I can copy image to the clipboard with a right click. This is quite handy.
Now if I use
or any smaller scaling, the pdf looks fine, but the copy image just results in a large black square in the clipboard (still of the correct size though).
Searching around, all I've found a thread on LinuxQuestions.org which reports a similar problem (not related to the scaling). Which notes that this is due to a single image sometimes getting stored as multiple overlays in the pdf. They give an alternative way to copy the images (which is inconvenient for non-linux users), but don't give information for how to write the latex to avoid this in the first place.
Is there someway to fix this?