Frost Mage / Spriest bugs and PvP:

'ey,
Thinking of rolling either a Spriest or Frost Mage for PvP, but am unsure as to the bugs/lack thereof associated with either class, and am just curious if there is anything noticeably broken (from a bug perspective) with either spec that would affect PvP.
Please note that I am not asking which spec is "better." If both are more or less working as intended, I intend to roll a Mage and spec Frost, as that spec comprises `70% of my PvP exp from live. If there is some sort of horrible bug with Frosties that isn't on track to getting fixed, but Priests are fine, I figure it's as good a fallback as any other.
Thinking of rolling either a Spriest or Frost Mage for PvP, but am unsure as to the bugs/lack thereof associated with either class, and am just curious if there is anything noticeably broken (from a bug perspective) with either spec that would affect PvP.
Please note that I am not asking which spec is "better." If both are more or less working as intended, I intend to roll a Mage and spec Frost, as that spec comprises `70% of my PvP exp from live. If there is some sort of horrible bug with Frosties that isn't on track to getting fixed, but Priests are fine, I figure it's as good a fallback as any other.