Just started last night...weird things is I have three yahoo email accounts on my BB and only started having issues last night. I deleted and tried to re/setup the account and it says the same error everyone is receiving...error during account validation. So far only one of the three has had this issue, though this account was setup a loooong time ago at the same time as the other one while the third is relatively new...been receiving yahoo mails on my BB with nos issues for the last year...if anyone has a fix or update please post.
Thanks!