I've had this feeling for a week now that there is a dust spot on my sensor, that the built in cleaning options isn't shifting.
I noticed it in a shot with a lot of sky but it was very subtle, so I went onto worrying about other stuff. Well, now with a day of nothing much (except changing a popped out headlight bulb in my car), I've looked closer.
In normal use, it is ALMOST invisible and it's easy to use the healing brush in PS to fix it, but I shouldn't have to; should I? Here is an example of it greatly enlarged:
Anyway... I went in and took a small portion (again, greatly enlarged) of the shot and upped the contrast way too much so the spot is visible, and here it is:
Larger version here: http://postimage.org/image/2yt8upq5g/
What do you think, lock up the mirror and use my blower on it?