As a software engineer, I think this is a basic requirement when I make presentations.

Right now fragments are not saved correctly event if they were added via "html" button.
The reason is "class" property is being erased on save (Chrome 23 & FF 17)

I suggest support right to left languages: supporting bullets on the right, combining english and non english writing from the right, transitioning the slides to the left instead of right, etc.

I see it done on another rvl.io, but cannot seem to figure out how to make it happen.

Can anyone help me out?

So, perhaps the 'idea' is for a couple of instructional vid's to help some of us out. I LIKE the simplicity of this tool, so please don't "complex" it up.

Button on the control panel to duplicate a deck so you can re-use / don't need to start from scratch each time

Happy with the public URL but I may not want my content promoted, would like an option to opt-out of main rvl.io website promotion

presentation names should support all UTF-8 characters

Must be able to print the slides, or at least print them to a PDF. Currently in Chrome it just shows a bunch of empty pages.

Would love to get analytics on who sees presentations and the ability to selectively share without publicly publishing (just a obfuscated but short link would do fine)

Usernames starting with "tos" or "about" apparently only give the "terms of service" or "about" pages instead of the user page :)

Like my page: http://rvl.io/tosh

Many times a presentation is a work of more than one person. Would be great to allow all of them to contribute to its edition.

Great work.

I found a bug: If inline SVG is used, it displays fine in the edit console, but when saving and previewing, the SVG element has been removed.

Test code to add to HTML editor:
<svg xmlns="http://www.w3.org/2000/svg">
<line x1="20%" y1="100%" x2="80%" y2="20%" stroke-width="2" stroke="green"/>
</svg>

Also, the code editor re-writes '<line/>' as '<line></line>' but that's probably not a problem.

its look like the arabic font support is not that good ..
the RTL is not working as it should, and the spaces turn into somethings else.

Its been a couple of times I sleep my computer and when I'm back I get a saving error.

Also, as a docs and iWork user I must admit I'm getting kind of used to autosave. I think it'd be a good (and huge, I bet, in terms of programming, storage, etc) addition. The "complementary" tools that usually come with autosave would be pretty good too (version control being the biggest).

I think it's a great goal though to strive to later in the future.

In editor alignment works OK, but when I go to Preview it is turned into <div style=""> and alignment is inherited from parent's rule:

.reveal .slides {
text-align: center;
}

As I said I tried in both Firefox and Chrome on Win7.

Link created in the presentation aren't saved. :-o