Issue with unused space at the right has been fixed with V 1.13

Well,
since Ossn has been developed having closed communities in mind in first place (actually, we had a lot of requests in the past not to allow ANYTHING visible!!!) we weren't focused so much on that..

I'll have a look into that ... but it'll take some time ...

The pages for the non logged-in users are not centrally aligned, I am including screenshots of the issues:
Issue with profile page or sub-pages.

Issue with Blog page for non-logged users.

Great work, Sir! thank you for it.

Yeah, you're addressing a long-term bootstrap/Firefox issue, see
https://github.com/twbs/bootstrap/issues/16201
The fix of volomike has been applied to 1.12 now.

Drop-down menus are looking different, in the register form as well as in the edit page, please have a look below

It will be great if all the drop-down menus looks similar.

No, the loading icon is pure css that comes included with each theme

Since I had to add a small startpage fix anyway, I added a new green spinner to V1.9 now.

Thanks Zetman for fixing all the issues, I have seen the pre-loader are same in every themes, so I am wondering with one question, Does the core controllers the pre-loader in every theme?

Hi Ranjan,
issues 1 to 3 are fixed with V1.8

tooltips are still not 100% (longer names may flicker on toggling) but that's no theme issue but caused by the underlying bootstrap library.

I think It was my fault I didn't reported you in correct way, may be this time my reporting can help you to fix some of this problem.
1. Pop-up showing the name in the right friend list is not looking good it appears as the arrow is not attached properly to the pop-up name
2. The small chat box header part is using the same blue default theme color which does not look good.
3. In the message page at online/messages/all and on the blog view page at online/blog/view/1/ is showing the circular image which doesn't fits well with the theme.
Well I am attaching a image of this issues, please have a look...