Subscriber email: GMail is converting height to min-height

This is a seemingly known issue when delivering email to Google users: Google changes any "height" declarations to "min-height". This means that images that are stacked no longer "touch" each other without a gap.

Does anyone know of a good work around?

Here's an example:

<div style="height:244px">
    <img src="http://www.domain.com/images/top.gif" alt="" />
</div>
<div style="height:266px">
    <img src="http://www.domain.com/images/bottom.gif" alt="" />
</div>

Appears as the following in GMail:

<div style="min-height:244px">
    <img src="http://www.domain.com/images/top.gif" alt="" />
</div>
<div style="min-height:266px">
    <img src="http://www.domain.com/images/bottom.gif" alt="" />
</div>

So instead of this:

Two images stacked on each other look like this in GMail:

There must be a simple workaround?