If anyone is planning to try to the Linux version of the beta, it feels like there is some kind of memory problem. Just now, around 60% (of 2GB) of RAM was consumed by Opera.
Also, if you use Opera Mail, be aware that version 10 converts the mail from version 9 so if you downgrade, your mailbox cannot be converted back, unless you delete the locally stored mail and re-download it all from the mail server. Alternatively, just make sure your install of the beta doesn't overwrite the stable release.
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