Then you changed something in such a way that in those list views, AutocardAnywhere is no longer working.  I appreciate that its easy to deflect whatever change was introduced when I guess wrong about what you did, but that doesn't alter the fact that there was a change and that it negatively impacts me and likely others and the visible expression of that change is in the pop-up behavior.

I use AutocardAnywhere which until very recently (up to Thursday or Friday of last week) worked just fine on Deckbox without modification to the white or blacklist.
Given that the tool continues to function as expected on every other site the only conclusion I can draw is that there has been a change to deckbox.org itself.  If there has always been this pop-over then I never noticed it until this change around the 21st was made.  Therefore, I'll reiterate my previous position which is to undo whatever change was implemented over the past weekend or provide some mechanism to prevent the site from blocking 3rd party tools.

As to the comment about adding price info to the deckbox tool tip frankly, there's already enough suggestions from deckbox about pricing from their chosen source (on tradelist, wishlist, and inventory pages) and I prefer some 3rd party input so I would say that in general it would be a waste of development cycles to add that to the pop-over currently used.

I use a chrome plug-in that the new mouse-overs conflict with.  If you won't roll back this change please consider adding some ability to disable that site function so that it doesn't interfere with other tools.