[web2py] Multiple File Upload Form Works! - Need Help with validation for multiple files

Thanks to Calvin Morrison's excellent work here is a really simple solution to uploading multiple items. I need help validating multiple files. I can upload one .txt file without issue; however, if i choose more than one it will not pass validation. Can someone tell me what kind of loop or

[web2py] Multiple File Upload

Is multi-file upload still roll-your-own, a la: https://groups.google.com/forum/?fromgroups=#!searchin/web2py/multiple$20file$20upload/web2py/XpnUb2_MaRc/DkUOi4iDrPYJ or is there something native, as per proposals: