Typically I would look deeper into this, but... There are many sources saying that this event did occur, and that "tank-net" thread is full of crap. Not only that, but there are reports of T-90's sustaining similar damage in Chechnya and Georgia among others.
"Full of crap" - Notice how they only mention it in a couple comments, and that they quickly changed the subject to something else. Had they had a thread on the subject, and/or provided actual sorces, it would be much more believable. One or two people's opinions doesn't equal the truth, as in this case.
Also, please provide the source of " confirmed by website author himself (he since long ago no longer updates the site)".