html - Extra padding only in Chrome -

i strange padding in h3 tag in chrome. strangest thing can't prevent or control through css , when select text of h3 seems selection expands right , bottom of text.

preview in chrome:

preview in other browsers:

this padding in chrome causes misalignments , expands height of container, undesired.

here's fiddle.

can please me locate problem?

note: use css reset, tried line-height, margin instead of padding no luck.

try adding line-height: 0; div:

#mailing div {     line-height: 0; } 

try adding:

#mailing .moduletable {     display: table; } 

updated jsfiddle: http://jsfiddle.net/bbjhe/12/