WowAce

BugSack is reporting two errors, which I usually spot some time after they occur, so I can't be certain what I'm doing to trigger them, sorry. I have been able to generate the Show() errors on my druid, for example in Balance spec when casting some or all of my instant cast-time spells, but not consistently.

2x [ADDON_ACTION_BLOCKED] AddOn 'Ace3' tried to call the protected function 'Quartz3CastBarPlayer:Hide()'.
[string "@!BugGrabber/BugGrabber.lua"]:485: in function <!BugGrabber/BugGrabber.lua:485>
[string "=[C]"]: in function `Hide'
[string "@Quartz/CastBarTemplate.lua"]:133: in function <Quartz/CastBarTemplate.lua:76>
[string "=(tail call)"]: ?

Locals:
_ = Frame {
}
event = "ADDON_ACTION_BLOCKED"
events = <table> {
}

and

2x [ADDON_ACTION_BLOCKED] AddOn 'Quartz' tried to call the protected function 'Quartz3CastBarPlayer:Show()'.
[string "@!BugGrabber/BugGrabber.lua"]:485: in function <!BugGrabber/BugGrabber.lua:485>
[string "=[C]"]: in function `Show'
[string "@Quartz/CastBarTemplate.lua"]:269: in function `?'
[string "@Quartz/CastBarTemplate.lua"]:145: in function <Quartz/CastBarTemplate.lua:143>

Locals:
_ = Frame {
}
event = "ADDON_ACTION_BLOCKED"
events = <table> {
}

Given the reference to BugGrabber.lua, I don't know whether this is a bug with Quartz or not. I have seen cases where the main player cast bar does not appear but the GCD bar does, implying that the player bar is not showing up when it should, but again, this is occasional, not consistent.

Sorry I can't give more useful information.