Yit,
See what the Debriciner Rav has to say about those who mistakenly were mattir (chelek 6, Kuntreis haelectri, siman 23 and others).
http://hebrewbooks.org/pdfpager.aspx?req=889&st=&pgnum=455
I didn’t know how to find that yarchon; thanks, I’ll take a look.