Check your settings just after import before you’ve made any adjustments. Is the Straighten under the Crop settings something other than 0, and/or is the Upright tool down in the Lens Corrections / Basic set to something other than None?
If so, then you may have customized your LR defaults and accidentally used a photo that had extra adjustments applied that you didn’t intend to be the default for every photo, and the fix is to set your LR defaults to what you intend without any extraneous adjustments—so zero out the ones you don’t want to be applied by default and set the LR defaults, again.
Neither of those values are set to anything other than zero. My import setting is "none" with respect to pre-sets; however, very possible I'm not looking in the right place.
If I were going to reset my customisations, where would I go? I've checked through all the menu items but I may be missing something.
Thanks for the above info!
If you have a tilted Crop setting it would be here:
And if you have Upright enabled then it would be something other than Off, here:
One more place to check is the Rotate slider in Lens Corrections / Manual:
To reset your Camera Raw defaults, which will affect both LR and Photoshop/ACR if you have that, in LR Develop, hold down the Alt key (or whatever the equivlant is on the Mac, either Cmd or Opt or Apple) and notice that the Reset button becomes a Set Default... button.
If you click on Set Default... you can Restore Adobe Default Settings, Update to Current Settings, and Cancel:
Maybe before you reset everything, can you upload a DNG exported from one of your RAW files with the issue, upload to www.dropbox.com and post a download link to it, here?
How are you judging whether your images need rotated or not? The units of the Angle slider in the Crop area are degrees, I think. Are you saying you need to adjust each image by .6 degrees for it to be straight?
All of these values are set to zero.
Can you upload an exported DNG for others to view as suggested in my previous message from September?