supported filetypes SVG, PDF and maybe CSS3

[quandry247]

I mainly use Xara P&GD 6 to produce scalable vector graphics for use on the Ubuntu linux operating system.
For the most part SVG exports are fine, sometimes I have to touch stuff back into place using Inkscape.
I'm not entirely sure why that is the case - is one of the two apps using an older standard of SVG file like I often find with PDFs?
Documentation on the subject is arcane.

web / mobile / operating system application applications continue to blur the line delimitering the three.
and I'm finding xara increasingly useful in producing graphics for the field but I want to sound a request for more information on supported files.

Has Xara kept up to date with modern file types? - that would be a prompt for me to upgrade versions.

I noticed that twitter's simple new logo is can be composed entirely of CSS3 Removed link due to 404 error

Is that an exportable file format xara is considering implementing in the future?