Excuse me? Can anyone give me any advice please?

Playing this game on the X Box 360, I'm having a problem with a quest called "The Heart of Dibella"

Here http://www.uesp.net/wiki/Skyrim:The_Heart_of_Dibella

I have a prior quest activated to steal the statue of Dibella for Degaine.
So I went into the temple in Markarth, took the statue, and on trying to get out, I was confronted by Hamal. (priestess of the temple)
Having listened to her explanation, I then agreed to go and retrieve the sybil girl from the village of Karthwasten, and so the statue is taken from me, (obviously) and off I trot to the village of Karthwasten.

All was going swimmingly so far, until I hit what I think might be a bug of some kind.
I had the Dibella quest activated in my quest log for a while.

But then I found that as soon as I got close to the village, the little arrow pointing to the quest location I had activated had disappeared and the quest in my quest log had ceased to activate when I clicked it!

I don't understand this at all!

Has anyone else had this problem, both on the PC and X Box 360?

Why is this happening? Any ideas?
Could it be something to do with the Degaine quest?
In the bugs section on that page I linked to, it says, and I quote -

"You can be given the 'Talk to Degaine' quest a second time, and the quest won't/can't update because you have already opted to steal the Statue of Dibella"

I don't remember being given the Degaine quest twice, only once.
But where it says the quest won't update since I've already opted to steal the statue for Degaine, I need to know.....
which quest is this referring to? Which is the quest that won't update?

If it's the Dibella one, then I think I have a previous saved game where I can work around this, and I think I would have to steal the
statue for Degaine instead since I already picked that 1 up from him earlier.
Though personally, I would much prefer to go on the errand for Hamal instead. *sigh!"

In any case, has anyone else had this problem too, or just me?

I'd try speaking to the people in Karthwasten and see if it updates with their dialogue to send you to Broken Tower Redoubt.

I think that the conflict screwed things up. When I received the Degaine quest, I stole it and delivered it...I felt bad.

I stole it back, and gave it to the Priestess. I then recieved the quest to save the girl. I saved the girl, killing the Briar Heart. Since then, I received a bounty from the Jarl of Whiterun to clear out that fort, and kill the leader.

Problem is, no leader ever respawns in Broken Tower Redoubt now. Sure, the lower level Forsworn do...but not their leader.

Because of this, I can not clear the bounty. And because I have an active bounty in my log book, I can never receive a Bounty order from the Jarl or inkeepers.

I think that whole quest might be buggy.

I may just try this and see what happens.
It might work for me, just to go there and talk to the villagers and see if any of them update the quest for me.
Though still, I don't see why the quest arrow should disappear even though I've been directed to the village.
Just doesn't seem right to me somehow.

Hehe.... I never thought of stealing the statue back from Degaine.
In my game, giving him the statue made him run off afterwards and I wasn't sure where he went to.
At least you got to retrieve the girl for Hamal. I haven't even managed to get that far yet.

And it does worry me a bit that you found no leader to kill in the tower, as I'm hoping I don't hit this problem myself. "sigh!"

If you don't mind me asking though, which system are you playing the game on?
If it's the PC, I know you can get into the coding of the game and change it so that the quest updates correctly.

I couldn't tell you personally what that is though since I have no idea and am playing on the X Box 360.

Quest markers do sometimes disappear. Sometimes there are points in a questline which have no marker (like Blood on the Ice).

PS3

When I stole the statue back, Degaine was sleeping on his bedroll in The Warrens.

As for the leader @ Broken Tower, he was there when I saved the little girl, and I killed him...After that, no "leader" ever respawned.

Because of this, my Bounty side quests got all funked up.