Which is the most stable OS for live use?

Just use the newest... I had some issues back in the beta days and prior to 1.2ish (I think) but never had one SINGLE issue in the last year and I always went to the newest (beta)software.

At the moment im using 1.7 live and its been super stable !!!

I'm with mDan here. You can use the latest firmware, no problem. There might be some nasty clicks in pitch shifting effects. But nobody will force you to use them, in 1.7 and earlier you don't have them anyway.

I think we're way past the time when there were some stability issues in early firmware versions. And CK told us many times, that the sound of the amp profiles will never change, as opposed to another infamous product.

Cheers,
Martin

Quote from bernband

I used the 1.8. beta for rehearsals and had troubles ... :-(. Suddenly strange "pink noise"....

Did you use a phaser? If yes, see here.

try 1.8.2.................

Yeah, it really is a little sad. That fix should take some minutes, I have seen so many links in this forum that are corrupted just because it has 2 /forum in it.

Played a show on saturday with 1.8.1 for 2 hours. No Problems! Don´t use the Harmonizer. Had the 1.7.x before, no trouble also.