The roll out of the January Car Pack for the PC version of Forza Horizon 3 hasn't gone to plan, with the game's 53GB dev build going out to players.

Worse than dishing out the wrong download, players who install the dev build - version ending .37.2 - and make a game save will find the save corrupted. Oops.

An update on the Forza Forums advises players on the best course of action.

"The incorrect PC version of FH3 has now been removed and replaced. PC players who have the FH3 version ending with .37.2 should immediately uninstall that version of the game, then re-install. The correct playable version should end in .35.2."

The forum post also states: "PC players who completed the download of .37.2 and then started a new game save will have a corrupted saved game. Avoid creating a new saved game on .37.2, and only play on .35.2 to avoid this issue. As long as you have an existing save and have not created a new one on .37.2, your saved game will work correctly."

On top of the game save corruption issue, the dev build has also leaked details of the Porsche cars forming an upcoming DLC.

356 A - '56

550 A Spyder - '56

911 GT2 - '12

911 GT3RS - '12

911 Turbo - '82

911 Turbo S - '14

918 Spyder - '14

944 Turbo - '89

959 - '87

996 GT3 - '04

Carrera GT - '03

Cayenne - '12

Cayman GTS - '15

Mecan Turbo - '15

All in all, not a great 24 hours for Microsoft.

Source: Forza Forums