win ie5 and ie6 fine, mac ie5 problems

I have my layout working fine in win ie5 and 6, but mac ie is giving me problems. I am trying to use a two column section within the content area, with a photo to the left, and text to the right. Here is a summary

X = photo, Y = text, 0 = whitespace

Win ie5 & 6:

XY
00
XY etc...

Mac ie5

X0
0Y
X0
0Y

the example can be found at http://www.millerwebconsulting.com/dev/mwc/mwc_pagelayout.htm under the "Websites" header.

the html:

          <div class="portfoliowrapper">
            <div class="porfolioimage"><img name="sdf" src="" width="100" height="70" alt=""></div>
            <div class="portfoliotext">
              <h2>Graphic Design / Logo Design</h2>
              Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do
              eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut
            enim ad minim veniam.</div>
          </div>	

and the css:

.portfoliowrapper {
	width: 370px;
	clear:both;
	margin-bottom: 15px;
}
.porfolioimage {
	float: left;
	width: 100px;
}
.portfoliotext {
	float: right;
	width: 250px;
	padding-left: 20px;
}

Any ideas on how to get this to work? I am just beginning to move away from tables for layout, so I am new at this...