Validation Error epub3

[soparch]

Can anyone help?
I have this piece of code showing up as a warning after validation (the funny thing is that the code passes when you use EPubcheck 4.0.0 but when you use EPubcheck 3.0.1 this warning appears)

background-image: -webkit-gradient(radial, 50% 50%, 0, 50% 50%, 26, from(white), color-stop(0.4, rgba(248,255,128,.5)), to(transparent) );

The warning is "WARNING: file.epub/OEBPS/css/p09.css(2): Token ')' not allowed here"
For the life of me I cannot see what is wrong - obviously something is but I cannot see it.

I am trying to upload to Kobo who must be using the older version of EPubcheck as they say it does not validate properly.
Thanks in advance
Soparch

[Doitsu]

This is definitely an epubcheck 3.01. bug. Apparently it doesn't like rgb color-stop values. Try replacing them with a hex value. The following appears to work:

background-image: -webkit-gradient(radial,50% 50%, 0, 50% 50%, 26,from(white),color-stop(0.4, #F8FF80),to(transparent));

At least it causes no validation errors.

[dgatwood]

Originally Posted by Doitsu

This is definitely an epubcheck 3.01. bug. Apparently it doesn't like rgb color-stop values. Try replacing them with a hex value. The following appears to work:

background-image: -webkit-gradient(radial,50% 50%, 0, 50% 50%, 26,from(white),color-stop(0.4, #F8FF80),to(transparent));

At least it causes no validation errors.

Except that loses the 50% opacity of the color stop, unless I'm missing something.

Better to email Kobo and ask them to update their buggy validator. :-)

You might also try adding a space between the close parentheses in case it's a really silly parser bug.