"The plugin does not have a valid header" upon activation

I have exactly the same problem.
There’s no answer?

Same for me :s !

Me three

same here, hopefully there is an update soon, or anyone with a workaround.

Ok, to get around that message, simply click ‘back’ in your browser.

Go to the ‘Installed Plugins’ page, and look for the cloudflare plugin, click the activate link there instead.

It works for me. I have written to Cloudflare to urge them to update the plugin to be compatible to WP3.5 anyway.

Hi,

Everything we have looked at actually indicates the users are using an older version of WordPress (not the most recent version). If you’re still having issues with this and you’re using a recent version, then please contact CloudFlare support so we can have an engineer take a look at it. Be sure to include the version number of WordPress in the ticket.

It’s inaccurate, as communicated in the email with cloudflare support, Damon (whom I believe responded to this thread), I am using the latest version of WordPress 3.5, at this point, there is no newer than that.

It a little disappointing to have a respond from the support team with a less than responsible dismissal reply.

Worpress 3.5 is released on 11 Dec 2012; cloudflare plugin has not been updated since “Last Updated: 2012-11-2”. Go figure.

I had the same issue, and am on WP 3.5. I agree with quirkylissy above… shame on CloudFlare for their slowness in taking responsibility and fixing this issue. It’s been nearly a month since 3.5 was released. Thanks to quirkylissy for letting me to now to click back and activate it from the Plugin page.

It’s inaccurate, as communicated in the email with cloudflare support, Damon (whom I believe responded to this thread), I am using the latest version of WordPress 3.5, at this point, there is no newer than that. “

This is not our primary support channel. I directed people to support so we can investigate further. We need real examples to work on any, including the domains being affected. My personal wordpress blog did not have this issue with the plugin at all.

“Worpress 3.5 is released on 11 Dec 2012; cloudflare plugin has not been updated since “Last Updated: 2012-11-2”. Go figure. “
The plugin was actually compatible with the most recent version, regardless of the update. What it looks like, however, is that something for some users was downloading something extra and we just pushed a fix that should alleviate the behavior.

If you are still having issues with the plugin, try to remove and re-install. If you still have issues, please contact us via the support link provided earlier. We will see if there is something else still causing the behavior.

I have seen this same error message randomly appear for a different plugin, so there seems to be something more wide-ranging going on.