(I seem to have lost my mantis bugtracker account - either that or I never had one and only filed anonymously. I'm in the middle of registering a new one now and will file this there once I'm able.)
AI War (all expansions installed) just notified me about the 7.008 update, which I grabbed because I love the bleeding edge. In this case, woe is me - 7.008 seems to be unable to read savegames from 7.007.
Symptoms:
On loading a save from 7.007, the game takes an excessively long time to get through 'parsing encoded lines' during LoadSavegame. On a modern i5 processor, this is normally pretty quick, but instead it gets through about 4500 lines (of 41,000+ in my most recent save) every ten seconds or so. On reaching the last line it just dumps me back to the title screen again with no error notifications. I tried another save from the very beginning of the same game - same issues, just less lines to parse.
Starting a NEW game with the same map seed, settings and homeworld worked fine. I was even able to save THAT game and reload it as normal.
If attaching one of the 'unloadable' saves would help, I can do that.
System specs, in case they matter:
Self-built PC from parts.
OS: Windows 7 Professional (64 bit)
CPU: Intel Core i5 3570 (3.40GHz, running at stock speed)
RAM: 16GB DDR3 memory at DDR3-1600MHz speed (stock clock and timings)
Boot drive is an SSD, AI War runs from a conventional spinning hard drive
Video: nVidia GeForce GTX 460 manufactured by Asus (stock clock)
edit: Adding RESOLVED tag to post title.