This is an e-mail that I got forwarded from Penson just yesterday:
"Good afternoon,
Thank you for your inquiry. Unfortunately the account in question has been identified by our Cost Basis Dev team as still needing a corrected 1099 due to unmatched tax lots or cost basis related information. They have been unable to provide us with an estimated time of completion. We are aware of the nearing tax filing deadlines and are working as diligently as possible to provide the information to the end clients as soon as possible.
If your customer is needing to file and is unable to do so due to the current 1099 issues, they can utilize the IRS form 8949 to indicate their cost basis analysis. Please note that this is not a solution to fix the 1099s, but merely an avenue the end client can utilize to complete their taxes. We apologies for the continued delays and inconveniences. Please feel free to contact us with any further questions or concerns.
Thank you"