The hotfix removes the on-use benefits of the Boon of Protection rune that affects Mantra of Healing, ensuring the "amount of damage absorbed is now capped at the amount of healing provided by Mantra of Healing in the first 3 seconds after activation." In other words, the monk could heal itself too easily, which caused problems in balancing the difficulty curve for everybody else, and this fix aims to change that.
Community manager Bashiok explained, "The Boon of Protection rune was approximately ten times over its budget on the benefits it provided, and it was quite simply a mistake on our part to let the rune ship as it was. We don't intend to take these quick and drastic measures often, but considering the severity of the issue, we felt it important to correct it swiftly."