Broken File Permissions during Usage

[ragingdave]

Perhaps a misconfiguration on my end, but this plugin has the possiblity of breaking file permissions.
For example, under a normal apache setup (files/folders owned like webdr:apache)
/var/www/html
|->test
|->test.php

Editing test.php, would cause the saved changes to be saved in a brand new file owned by webdr and owned by group webdr, completely breaking file permissions structure and normal operating procedure for VIM.

If it was a misconfiguration, More instructions are needed to ensure that this doesn't happen. Otherwise, this plugin is completely and totally unusable in normal environments.

[KexinLu]

Solution I provided caused other issue, will look into this a bit more