To explain, what happened,this 1.0.3 update increased the save cap to 46 instead of 45 before corrupting the save file(only applies to older saves 1.0.2 and below)
FYI : Creating a new save file with "Save As" does not reset the cap to 0, it counts as 1 save , so if you were on 45 before , clicking the "Save As" option to create a new save file will only increase your save count to 46 and thus corrupting your file again.
I've heard from other players that creating a new game on 1.0.3 has a save cap of around 54 instead. This 1.0.3 hotfix is a short-term measure to fix this bug , hopefully TaleWorlds will have a more stable fix to this corrupting save bug.
Let's not forget that this game is still in Early Access and we players are here to help find bugs so that the game can be improved on. Hopefully in a month's time or so , this game can become polished to being a timeless masterpiece as Warband is.