The 10.10.10 hotfix release fixes two bugs. Firstly, an issue with email sending where explicit *from* addresses were not honoured. Secondly, an issue with quick add/edit buttons on object pickers not using data manager customizations for permissions checks.
[PRESIDECMS-1393] - Email service send(): setting 'from' address does not override template setting
[PRESIDECMS-1394] - Object picker quick add/edit: permissions not using new data manager customizations