Hi,
I think I know why. There is a custom CSS rule, I believe within the theme, that changes the text indent when any input placeholder is focused.
To resolve it, apply this code to your theme custom CSS field (if it supports it) or use the custom CSS field on the search plugin back-end.
[html]input.orig::-webkit-input-placeholder { /* Chrome/Opera/Safari */
text-indent: 0 !important;
}
input.orig::-moz-placeholder { /* Firefox 19+ */
text-indent: 0 !important;
}
input.orig:-ms-input-placeholder { /* IE 10+ */
text-indent: 0 !important;
}
input.orig:-moz-placeholder { /* Firefox 18- */
text-indent: 0 !important;
}[/html]