What steps will reproduce the problem?
1. No clear steps, seems to be random. Appears the addon is losing its connection to the datastore.
2.
3.

What is the expected output? What do you see instead?

Addon works fine after install for a period of one to two weeks and then error happoens on login. This breaks the addon's ability to track new data. Item counts vanish from tooltips and the version number is no longer displayed in the title bar of the addon's GUI frame. Only workaround is to completely uninstall and re-install addon, knowing it will break again in short order.

What version of the product are you using? 4.3.001 released 12/10/2011

Do you have an error log of what happened?

Message: Interface\AddOns\Altoholic\Events.lua:452 attempt to perform arithmetic on local 'timeGap' (a nil value)
Time: 01/07/12 21:08:07
Count: 1
Stack: Interface\AddOns\Altoholic\Events.lua:452 in function `BuildList'
Interface\AddOns\Altoholic\Events.lua:520 in function `Init'
Interface\AddOns\Altoholic\Altoholic.lua:354 in function <Interface\AddOns\Altoholic\Altoholic.lua:347
(tail call): ?
[C]: ?
[string "safecall Dispatcher[1]"]:9: in function <[string "safecall Dispatcher[1]"]:5>
(tail call): ?
...\AddOns\DataStore\libs\AceAddon-3.0\AceAddon-3.0.lua:543 in function `EnableAddon'
...\AddOns\DataStore\libs\AceAddon-3.0\AceAddon-3.0.lua:636 in function <...\AddOns\DataStore\libs\AceAddon-3.0\AceAddon-3.0.lua:621
[C]: in function `LoadAddOn'
Interface\FrameXML\UIParent.lua:274 in function `UIParentLoadAddOn'
Interface\FrameXML\UIParent.lua:297 in function `CombatLog_LoadUI'
Interface\FrameXML\UIParent.lua:616 in function <Interface\FrameXML\UIParent.lua:582

Locals: <none>

Please provide any additional information below.

Am currently in the process of testing for conflicts with other addons, but no luck so far.