Last night I was playing with the 25th June build and saved a couple of games. When I loaded up the game this morning both of them were missing in the "Load" option of Full Campaign. I assumed I'd buggered something up with my fiddling or it might be something to do with having 2.4, 23/06-2.5, and 25/06-2.5 installed, so I wiped all installations and downloaded 26/06-2.5. I played for an hour or so earlier today and saved two games.
Just loaded up the game and once again the save games are missing. Bug or idiocy on my part? Oops.
Once I loaded up my mod the savegames appeared again. Didn't realise they didn't show up in the list if you forget to load up the mod you were using with them! My apologies.