I am also running Snow Leopard. I had it running earlier and the memory
usage went up to about 500MB after about 15 minutes or so. I restarted the
app twice and while it is working at the moment, it is using roughly 775MB
of system memory. This really looks like a memory leak of some kind. I
don't remember the previous version more than 300MB or so. I have put quite
a lot into Evernote and am very loathe to switch to a new platform. I am
sure this is a fixable issue.