Time: N/A
Frequency: Intermittently.
World name: Sargatanas
Character name: Ceol Ashwin
NPC name: N/A
Monster name: N/A (Happens in many fights.)
Class/Level: WHM/50
Party or solo: Party
In-game time: N/A
Area and coordinates: N/A
Steps:
1. Have yourself as WHM and another WHM in party cast Regen on a single target.
2. Before your Regen wears off, recast it on the same target, as if to overwrite it.
3. Normally, this would overwrite your Regen with a fresh cast, but often times, it just gives a "Regen has no effect!" message. I have only seen this happen in groups with another WHM who uses Regen as much as me.

Connection Specs
- Comcast Internet

Model Number of the PlayStation 3 You Are Using
- Model Number: (Unsure) Original 60GB PS3