[deback]

Originally Posted by thiago.eec

I beg to differ. It works just fine using this:

p {
   text-indent: 0em;
}

Also, see the CSS specification:


4.3.2 Lengths
Lengths refer to distance measurements.

The format of a length value (denoted by <length> in this specification) is a <number> (with or without a decimal point) immediately followed by a unit identifier (e.g., px, em, etc.). After a zero length, the unit identifier is optional.

https://www.w3.org/TR/CSS22/syndata.html#length-units

Okay, well, why does Calibre's Check Book display an error when "px" is missing from the width and height of an image class? I've had this type of error many times in the past.

Example of a class that would result in an error, per Check Book:

.image {
height: 300;
width: 400;
}