Still having this issue by the way. I've basically given up hope, and considering the original Mass Effect's terrible DRM, being allowed only five installations and then having to call the support to have those reset, and the fact that I've heard Pinnacle Station is quite pointless and aside from introducing Batarians Bring Down the Sky isn't all that interesting, I think I will just leave it at that, and let that version of Shepard, which I couldn't continue playing, just quietly die.
Still a shame though, would have been way better if EA could have just fixed this issue.
You said you have the Origin version of ME1?
BdtS is already part of this version.
Did you changed the in game language?
The save games are language locked, so if you changed the in game language from German to English for example the saves will not load.
I have the game installed in German, and after now trying it out once more it seems to be a corrupted save file, not the game installation itself. A different Shepard career loaded with BdtS and PS just fine.
I guess that closes this matter. =)
