Gran Turismo fans closely monitoring the progress of Polyphony Digital's Gran Turismo 5 Prologue may be interested to know that the Japanese version of GT5 Prologue Spec II is updated with quite a number of revisions and bug fixes.These changes include the removal of "unusually high scores" in the Drift Trial, as well as some improvements added to online play.

Check out the changelog of sorts for this updated version of GT5 Prologue:

Online play

• The award of race credits are now allocated at a fixed rate regardless of the number of race participants.
• The High Speed Ring course diagram has been fixed.
• Some online ID's were appearing in grey in the entry list, this has been amended.
• Some online opponents appeared to "blur", this has been amended.

Rankings

• Country and area information now appears next to the online ID in the ranking boards.
• Unusually high scores had been recorded in some Drift Trials, this has been rectified.
• When Drift Trial replays were saved, occasionally these appeared in the "Load as Ghost" option of Time Trials. This has now been rectified.

Performance Points (PP)

• The method of calculating Performance Points has been revised, to balance vehicles in events with PP upper limits.

Miscellaneous

• LCD display has been added in the F2007 interior view.
• Some interiors and exteriors of some vehicle models have been revised.
• On occasion the Quick Tune gear ratio became impossible to reset in some cars, this has been amended.
• The manual has been updated.

Well there you have it. A caveat: upon updating your game, the game developers will reset all ranking data, as there were some changes made in the Drift Trial rankings. Button assignments will also be set back to default settings once the update is in effect, beginning on April 15.