WowAce

What steps will reproduce the problem?
1. Enable in game quest objective tracker sidebar
2. Click a quest number to try to track it

What is the expected output? What do you see instead?
Normally the world map would open with the quest bubble in yellow and it's marked area in blue.
Notice world map opens blank and buggrabber grabber throws this error (see error log).

What version of the product are you using?
r93-release

Do you have an error log of what happened?
Interface\FrameXML\WorldMapFrame.lua:2146: Usage: GetQuestWorldMapAreaIE(questID):
Interface\FrameXML\WorldMapFrame.lua:2146: in function 'WorldMap_OpenToQuest':
Interface\FrameXML\WatchFrame.lua:1397: in function
<Interface\FrameXML\WatchFrame.lua:1383>:

Locals:
questID = nil
frameToShowOnClose = nil

Please provide any additional information below.
Started before december 3rd 2010

another ticket (http://www.wowace.com/addons/smooth-quest/tickets/14-quest-colors-and-error/) is basically a duplicate of this. The error I got and experienced sound different but it has the same steps to recreate.

change line 72 to 77 to

local function GetTaggedTitle(i)
	local name, level, tag, group, header, isCollapsed, isComplete, daily, id = GetQuestLogTitle(i)
	if header or not name then return end
	if not group or group == 0 then group = nil end
	return string.format("|cff%s[%s%s%s%s] %s|r", rgb2hex(GetQuestDifficultyColor(level)), level, tag and tags[tag] or "", daily and tags[DAILY] or "", group or "", name), level, tag, group, header, isCollapsed, isComplete, daily, id
end

should fix the problem