It seems it got closed, but I'm not sure it is really fixed (can't add notes now).
http://bugs.freepascal.org/view.php?id=12594

In D5 the DFM files are something like this with bitbuttons: .
.
.
object BitBtn1: TBitBtn
Left = 96
Top = 52
Width = 75
Height = 25
TabOrder = 1
Kind = bkOK

   end
   object BitBtn2: TBitBtn
     Left = 176
     Top = 52
     Width = 75
     Height = 25
     TabOrder = 2
     Kind = bkCancel
   end

.
.
.
Because the "Caption" and "Modalresult" properties were not specified in there, the converter did not add them automatically for FPC using the "Kind" property (D5 did this automatically it seems). bkOK -> Caption = "OK" and Modalresult = 1
blCancel -> Caption = "Cancel" and modalresult = 2 etc.

ABorka wrote

It seems it got closed, but I'm not sure it is really fixed (can't add notes now). http://bugs.freepascal.org/view.php?id=12594

You may want to post this message to the lazarus list instead.

Jonas