Transaction Under Review - WTF?

[kryunn]

I have just received this right after a non-high risk regular payment (U$S 20) on my excellent standing 6 years account:

"XXXX XXXX just sent you money with PayPal. To help protect you, we're
reviewing this payment.

The Payment Review may take up to 24 hours. When we've completed the review, we'll either clear or cancel the payment. If the payment clears: You may proceed to process the order. To know if your item is covered, check the 'Seller Protection' section of the 'Transaction Details' page and ensure that it states 'Eligible'.

You shouldn't provide the item or service purchased until we let you know that the payment has cleared. We'll send you an email when we complete the review or you can check the Transaction History tab of your PayPal account."

WTF? Is the problem on mine or buyer's side?

[slapped]

Most Likely on the Buyers Paypal, I Have had this Happen to me, Wait for Paypal to give you the All Clear.