Restricted Content Error Again

Hello,

I am facing Restricted content Error for some files in dropbox while downloading them using Dropbox API for Biz using .NET.

Files for Dropbox Customer A:
/Archive/company/filmdistrict legal/1_forms/administrative tools/credits templates/Billing Block Template/._EXAMPLE Billing Block - UPDATED TEMPLATE (5.3.12).doc
/Archive/company/filmdistrict legal/1_forms/administrative tools/credits templates/End Credit Template/._Example End Credits (updated 04.20.12).xls
/Archive/company/filmdistrict legal/1_forms/administrative tools/credits templates/Main Title Credit Templates/._EXAMPLE - Main Titles (Mains-on-End) - UPDATED Template (05.03.12).docx
/Archive/company/filmdistrict legal/1_forms/administrative tools/credits templates/Main Title Credit Templates/._EXAMPLE - Main Titles - UPDATED Template (05.03.12).docx
/Archive/company/filmdistrict legal/1_forms/administrative tools/credits templates/Union Credits Memo/._Credit Guideline.doc
/Archive/company/filmdistrict legal/1_forms/administrative tools/credits templates/Union Credits Memo/._RE_ Union Credit Requirements Memo.pdf
/Archive/company/filmdistrict legal/1_forms/administrative tools/credits templates/Union Credits Memo/._Union Screen Credit Provision Memo 9-28-11.doc
/Archive/company/filmdistrict legal/1_forms/administrative tools/Credits Templates/._cara_advertising_rules.pdf
/Archive/company/filmdistrict legal/1_forms/administrative tools/Credits Templates/._cara_rating_rules.pdf
/Archive/company/scripts/Black List 2013/Holland, Michigan by Andrew Sodroski.pdf
/Archive/company/tb-lb/projects/hugo/hugo stills/HUGOselects_week7/._.DS_Store

Files for Dropbox Customer B:
/Public/working files/software/SW_DVD5_Office_Professional_Plus_2010w_SP1_W32_English_CORE_MLF_X17-76748/setup.exe

Error : path/restricted_content/

We faced this issue earlier as well and Dropbox resolved something at their end.
Why does this error occur ?

Can you please resolve the issue again.

Thanks,
Gagan