Found a work around for D2005

I continued testing, this time on Delphi 6 and the same bug that occurs on D2005 came up. I tried to figure out what was the problem and since in all cases I used D2005 midas.dll the problem should be somewhere inside DBClient.pas. I compared the relevant code and found out that only on D7+supplemental database update (in CloneCursor implementation) a call to CancelRange was made (in case Reset parameter is true). I just added this call in my overridden CloneCursor method and this way fixed the problem.
What I don't understand though is why was this change not included in D2005 version of DBClient.pas. May be a call to CancelRange causes another problem I can't imagine of.