Evernote on Mac OS X 10.5.8
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Works and syncs once more! I don't know why it stopped working and I
have no idea why and when it started working again but it does!
Your mileage may vary, of course. I am (still) their paying customer
and I'm using the latest OS X update (I saw reports that there are
issues on the OS 10.4).
I wanted to charge the PowerBook today so I tried to run a few things.
And this was a nice surprise.