P: Export isn't resizing exactly to specified long edge

Yes, long edge seems to work, my first attempts were successful, at least. Still I'd hope that they'd get this to work properly someday. If my image is not cropped correctly, I should still get the pixels set in the form ... Thanks, Todd!
EDIT: And yes, I do get that silly  2x3/4x6 instead of the ratio that I actually entered. As if LR had not arrived in the web age yet.

There is a rounding issue in the Crop tool and Export Resize to Fit algorithms. It's generally best to use Resize to Fit  'Long Edge' setting and then enter just the larger edge value. What is the exact size of the cropped original image (xxxxx by xxxxx pixels). On my system entering a 200 x 133 'Custom' Crop Ratio pulls up 2x3/4x6, which is 1.0 to 1.5 Aspect. Using that value the Export Resize to fit would be 199.5 x 133. Using Long Edge = 200 should produce consistent results of 200 x 133.

My images, in this case, need to be 200x133px. I already cropped them to that ratio. In Export, I select "Fit to screen"/"Width&height" then enter 200 and 133 into the fields. What I get is 199x133, for example. But not always, seems random. Tried it at home just now and got 200x133 there.

What "edge size" do you want and how are you entering the values in the Export module?

It is not fixed, not even in 2016. Or it was once fixed, and the issue zombied back into a recent release.

I'm on LR 2015.8 - still that old issue. Driving me nuts. With a lot of experimenting with "alternative" edge sizes, I eventually got the right size. I still don't see why this bug has still not been fixed.

"Below you will find the required resolutions for our alternative products. To achieve these exact dimensions you may need to crop your original high-resolution file. However, do not increase the size by resampling in a photo edition program, as this will distort the quality of your work. " 

^ from a photo printing site

Hey guys, so I think what you have to do here is since I export my RAW files that are at 5184x3456, when you're trying to export to 1920 x 1080, the program will adjust for the crop factor and export at like 1620 x 1080 because that makes sense to 1080p.

So what works for me is to export at 1920x1280 and then size or crop in after effects or premier. .

Hope this helps.

I'm having the same problem described with Lightroom CC 2015 on OSX - I want to export images with a fixed width of 350px, mostly they come out at 349.

Tried to hack a solution by entering 351px, but of course, that would work perfectly - images all at 351px...!

Some sort of rounding error, bug really should not be roaming free this long, good thing we are now all on fancy shmanzy subscriptions now so Adobe can roll out patches really really quickly...

OK - thanks, fair enough...