The userdata.exe and userdata.sys files included in the 617 directories of the latest DP4 CD-ROM were 4.616 versions, so did not support gradient colors properly on Windows 98 and Windows 2000.
Where the version affected is given as 4.5xx or 4.6xx, all versions of DP4 issued prior to the date of the fix are potentially affected. Where a specific version number is given the problem was introduced by that release and prior releases are unaffected. If a patch release number is also specified (in parentheses) , the fault was introduced at that specific patch level.