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I've done something in my Opera profile (maybe deleted many RSS items or subscribed to a new one) that completely broke Opera. Now when I run it, it consumes 100% RAM and quickly saturates the swap file.

In the profile, I use email and RSS feeds. I tried sudo opera, it runs normally.

How can I fix this?

OS: Ubuntu 12.04.1, Opera 12.11.

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I know this is a bit late, but I just came across your question...

If you delete Opera's profile file, it will automatically create a default one when it starts up. That should fix your problem. I've done this a couple of times in the past, when I couldn't be bothered to figure out what the reason was for weird behaviour. It works like a charm.

According to this page, the profile file (opera6.ini) under linux is in ~/.opera

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