I've set up a JSFiddle to test several different solutions to this problem. Based on the [vague] criteria of
1) Maximum flexibility
2) No weird behavior
The accepted answer here of
img { display: block; }
which is recommended by a lot of people (such as in this excellent article), actually ranks fourth.
1st, 2nd, and 3rd place are all a toss-up between these three solutions:
1) The solution given by @Dave Kok and @Hasan Gursoy:
img { vertical-align: top; } /* or bottom */
pros:
cons:
2) Setting font-size: 0; on the parent element:
.parent {
font-size: 0;
vertical-align: top;
}
.parent > * {
font-size: 16px;
vertical-align: top;
}
Since this one [kind of] requires vertical-align: top on the img, this is basically an extension of the 1st solution.
pros:
cons:
3) Setting line-height: 0 on the parent element:
.parent {
line-height: 0;
vertical-align: top;
}
.parent > * {
line-height: 1.15;
vertical-align: top;
}
Similar to the 2nd solution in that, to make it fully flexible, it basically becomes an extension of the 1st.
pros:
cons:
So there you have it. I hope this helps some poor soul.