Clicking outside the image upload entry box to close it kills paste function.
System info: FF 39.0 & Chrome Version 43.0.2357.134 (64-bit) on Mac OSX
Occasionally when I'm using the image uploader to link to images on the web, I will be unable to paste the URL into the entry field or into the general text entry area.
The easiest way I've found to repro this is:
It seems the current "fix" is to use the x in the upper right corner to close the dialogue box and the paste function returns but I swear (in my frustrated tear-fogged brain) that there have been times this did not "fix" it but I can't repro that now.
Also, the system is clearly trying to paste... the edit menu flashes the way it usually does when you paste something, it's just that the content of the paste never appears... or it's in some other universe.
This should be fixed in the next build (at time of writing, current is 2015.8.3.3627 - so something above that).