Problem with validation PDF/A-1a

I have PDF/A-3a file. During the process of Preflight Validation i got errors, but file contain tags and Structure root.

Is this a valid pdf/a file?

File: http://www60.zippyshare.com/d/1RAhUFhS/7525893/ARGOS_Rates_2008_EUR.pdf_PDFA_3a.pdf

Adobe Acrobat 11.0.15