Just tried VPT 7 on 2 other macs, 10.7.5 same problem, 10.5.8 saving presets works perfectly.
Current scorecard for me is:
10.8.2 - NO
10.8.3 - NO
10.7.5 - NO
10.5.8 - YES!
Too bad 10.5.8 is such a slow computer!
I did try opening the preset.json file from the 10.5.8 machine on the 10.8.2 machine and it did not open.
Which release of 10.8 did you get it working on?
Do I need any other software? Javascript, max etc?
Any thoughts on the missing patcher error in the message window? "patcher file presets.json missing patcher!"
Thanks