In GT++ 1.6.99, the mods correctly strips Mekanism items of their Forge Ore Dictionary entries, which means that the Mekanism Ore and Circuits are useless for GregTech progression.

In GT++ 1.6.103 and GT++ 1.6.110, this modification is no longer in effect, and Mekanism circuits and ore can freely be used by GregTech.

Issue currently ongoing, reverting back to GT++ 1.6.99 restores this change.

GregTech 05.09.32pre1
IC2 2.2.827-experimental
GT++ Single Player
Issue Class: Minor

Please report the issue properly.
https://github.com/draknyte1/GTplusplus/wiki/Github-Issue-Format

Feel free to edit this one and comment, so it can be reopened.