The BackLink Checker was previously checking empty BackLinks. The problem was because the Google API returns an estimated number of results usually. So if Google said you had 50 but you really only had 49 then the BackLink Checker would check the Page Rank of one blank URL. Is that a problem? It should be. However the Page Rank of a Blank URL is 8. This made the BackLink checker think you had PR 8 backlinks which wasn't the case.
The checker will now return the correct message if the Key fails for whatever reason. Also when I say 25 I mean the first 25 links returned from Google.
I have updated the progam and one can now check up to 500 backlinks but doing so takes at least several minutes.