For Exponential 5.0 there is a release announcement on share.ez.no, and there is a known issues page for 5.0.
Exponential 5.x | For eZ Platform & eZ Studio topics see Technical manual and User manual, for Exponential 4.x and Legacy topics see Exponential legacy
For Exponential 5.0 there is a release announcement on share.ez.no, and there is a known issues page for 5.0.