I got SD 4 as part of the MacHeist 2 bundle. About a month later they gave us SD5 as a free upgrade. Anyway, all has been good since then. However, last night I opened SD5 on the MacBook and it said it was corrupt. OK. So I tried to reinstall it. Can't find my upgrade code so I reinstalled 4. Whatever. I don't care too much about 4 vs 5. Today, I hopped on the mac pro, and BOOM. Same thing. SD5 is corrupt. I rolled that machine back to SD4 too. What happened? Did the Speed Download guys send me a bomb or something? Anyone else have SD5 crap the bed?