I'm having trouble using Basecamp in Chrome: it's started to error out most of the time (but not 100% of the time) with

Error 205 (net::ERR_CERT_UNABLE_TO_CHECK_REVOCATION): Unknown error.

I'm not having any problems logging in or using it in other browsers. I have a about a dozen Addons/ plugins, but I can't say this started right after installing a specific one. How can I debug this issue?

2 Answers 2


This appears to be due to a bug in the newest update to Chrome (release 13th May 11' in Australia).

Hopefully it will be address soon, until then here are some ways to get around the issue


FYI here is the chromium ticket. It's from 09' but there's a recent addition from yesterday.


Try clearing your cache. This is due to the recent certificate update from MS.

  • Doesn't seem to make a difference. The error is intermittent and I'm seeing it on other sites now (github) as well.
    – Tom
    Apr 11, 2011 at 16:18

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