There are 3 caches on the Western Maine border which do not show as being in Maine. I may have to edit the shape files a bit, but for now you can just enter the data in manually. The gc.com maps also show these caches across the line.

Route 2 Tour-State Line (GCYGGA) by mainiac1957 and Quilting Mom (1/1.5) - which is in Gilead - Oddly enough, gc.com's maps show this in Nh too!
S.F.R.W. Standing by peacefull waters (GC1X9W2) by THEHIWAYMAN & JKJEEPCHIC with IAMSURVIVORMAN & BC (3/3) - Which is in Lebanon
You Can't Get Here From There (GC2DHTW) by NH River Rats (1.5/1.5) - Which is in Bowmantown Twp