In odoo 8.0 new smart buttons were introduced: Some users expects, that in a company's form these buttons will search information about tasks, invoices, meetings etc. for whole company. But out-of-box buttons work only with records that are attached to company and not to company's contacts.
I have made module
res_partner_company_stat to fix this issue.
E.g. in "Calls" smart button you will get calls both for company and for
Another issue is search in contacts. With my module
res_partner_company_search contacts are searched by company's fields also. E.g. you search contacts with a tag "Veterinary" and you get "child1" even if it doesn't have this tag, because his company does.
(Out-of-box you will get in search results parent2 and child2 only).