Just to add another voice, I am currently running the Octa-Capture v. 1.50, and haven't had any stablity problems. Not using too many soft synths, and I tend to use a limited range of plugs, too (rock based music.)
I have had a little bit of issue with noise trying to track 8 outputs of my Roland V-drums at once, but I believe that can be chalked up to starting with too hot of a signal on the drums.
However, I do have a question for everyone: If I max out my input mix (useful when tracking my drums,) I gets
TONS of ugly digital noise. I don't think any of this is bleeding to the track or anything, but it is annoying. Anyone else get similar noise through their direct monitoring?