I am just going through the same thing ..yet again!
I now have a 90 day late appear from nowhere on a charged of account (last activity was 2003 ..now is listed as last payment 2008)..I have made no payments and I have no 90 days late! my score got dinged 27 points (possibly more) .
I called fico they assured me it was correct and to contact Equifax ..whch I did they are not showing a 90 days late on this account but did have dola as 2008 ..
Anyway I disputed the date as that was all I could do..I can't dispute the 90 days late as Equifax doesn't show that!
I did dispute this account last month ..sometimes I thing they punish you for bothering them!
I also had this happen on another fico report ,again the account has been closed forever but a 3 months late appeared from no where on the explanation report for reason why my score is low.. the last late I have on only one account on this whole report is 6 years old and the account is closed zero balance!
I am feeling the sting abit less on this one as it changed from a 3 month late to 4 month late and my score rose...The only late is on an account I had disputed(the 6 years late) and also the creditor has asked it to be updated so we will see what happens..if the late from nowhere disappears.
Basically though everyone just blames everyone else..my fico said contact credit bureaus but they just think your crazy as they arn't showing anything to fix! They tell you contact oc..but how can oc fix a 90 day late that's only showing on myfico report as they don't deal with them!
Anyway good luck : )