Just to confirm works fine on 1.3 for me - with the exception of KerbNET access is gone.
Have plenty of mods loaded - but KerbNET pops back on/off when OPM is uninstalled/installed.
Wouldn't let that put you off though - ScanSAT is a far more realistic and enjoyable cartography experience anyway!
@nickicool - can't confirm as I haven't gotten out to an actual outer planet yet, but as mod description describes: -
Explore 17 highly detailed planets and moons, all in a stock-a-like artstyle
Discover never before seen worlds, such as a subsatellite, Trojan moon or a set of binary bodies
Collect science in over 140 biomes, with almost a thousand unique science blurbs
Custom terrain textures and improved ground scatter has made planets and moons never look so good up close
A full set of KSPedia entries for OPM’s various bodies helps you to navigate the far reaches of the Kerbol system
Extensive third-party mod integration means you can play OPM with a whole range of other mods
Kudo's to original mod maker & those giving of their time to maintain it!