TYPO3 Core

If I build a link from an image with smth like this:

lib.test {
10 = IMAGE
10 {
file=fileadmin/images/icon_home.gif
stdWrap.typolink.parameter = email@domain.com
}
}

it works perfect until I add spamProtectEmailAddresses_lastDotSubst, for example:
config.spamProtectEmailAddresses_lastDotSubst = .<span style="display:none;">dont-want-spam</span>

Then this directive effect src URL of an image replacing last dot in it, so in FE I got smth like this:

<img src="fileadmin/images/icon_mail.<span style="display:none;">dont-want-spam</span>gif" width="11" height="10" alt="" title="" />

TYPO3 4.0.1
(issue imported from #M3985)