What I have done to try and work around this problem (and it is a big problem for an otherwise perfect plugin) is to increase the size of the slide container so that it is a large square 750x900px and almost accommodates an entire portrait oriented image, then move that below the ad detail in the template.
It would be better though if you could make it so that the slider box thing shrinks down portrait images to fit its height. Maybe there’s an easy way to do this? I’m just a hack, not a real programmer.
How to fit images inside the slider without cutting off its edges, the easy way:
Replace img height:auto; with
#slides1 img {
max-height: 100%
}
which will force the image to fit inside its container heightwise.
If your themes background colour isn′t white, it will leave a ugly white background box, so you should also style that to look better:
#slides1 li {
background-color: #fff;
border: 0px solid #fff;
}
Worked for me.