Hughton was unceremoniously axed by the Magpies in December 2010, despite the side being in mid-table in the Barclays Premier League following promotion the season before.
The 54-year-old, though, insists plenty of water has flowed under the bridge since then, as he went on to manage at Birmingham before taking over at Carrow Road following Paul Lambert's departure last summer.
Nevertheless, Hughton is still held in high regard by the Toon Army and received a warm reception when Norwich played at St James' Park in September.
However, with Norwich having lost their last four Premier League games before last weekend's FA Cup win at Peterborough, Hughton maintains he has enough to worry about within his own squad than to concern himself with what might be going wrong for Magpies boss Alan Pardew.
"Of course it is a nice feeling, and it is probably an appreciation of the job I did there," Hughton said.
"But as soon as that whistle blows, it is about business and trying to play well enough to get the points.
"Anything at Newcastle now, though, is not my concern. My only concern is here and the job I am doing here."