I did a reinstall of .1917 from scratch using an autoloader. My PB now flies, so overall I'm quite happy.
One minor nuisance, though: it takes quite a bit longer to connect to WiFi than it used to. Typically, I have WiFi off because I mainly use the PB for offline viewing/listening. But when I switch the WiFi toggle on, it remains white (searching) for a good 10-20 seconds before it turns to green (connected).
I've double-checked my WiFI settings and all looks good. I deleted the saved profile and readded it manually, but I still notice the same symptom.
Anyone else experience this? Again, it's not a big issue, and I can live with it given the current performance after I used the autoloader, but thought I'd toss out to the forums to see if anyone has any suggestions.