Comments Plus Twitter Connection - Cookie Issue

When I try to sign in with Twitter. The Twitter popup shows an error message: "This page is no longer valid. It looks like someone already used the token information you provided..."
When I delete the cookies everything works fine for a short period of time. This issue was already discussed 12 months ago. Did you find a solution? I can't tell my client, that their users have to delete all the cookies before posting witht Twitter.
Thanks, Serge