Confirmed for me too - jaggies gone! My installer app does look ever so slightly lower than my other icons, but it doesn't have jaggies when wiggling.
I'm not sure if I was/am experiencing the 1 second app-opening delay supposedly caused by winterboard, but it seems like stuff opens a little faster after this latest winterboard update. But maybe I'm just imagining it. FWIW, the "random" reboot after upgrading winterboard is still there. About a minute or so after my upgrade, it rebooted the phone as expected. No other problems with reboots at any other time, just the one time 60 seconds after updating. I'm sure Jay will figure it out, though.
I'm not sure if I was/am experiencing the 1 second app-opening delay supposedly caused by winterboard, but it seems like stuff opens a little faster after this latest winterboard update. But maybe I'm just imagining it. FWIW, the "random" reboot after upgrading winterboard is still there. About a minute or so after my upgrade, it rebooted the phone as expected. No other problems with reboots at any other time, just the one time 60 seconds after updating. I'm sure Jay will figure it out, though.