Hello,
for those who have problem with the product details image height
find the file components/com_virtuemart/assets/css/vmsite-ltr.css
at line 164 change the
.main-image img {max-width:100%;max-height:260px}
with this
.main-image img {max-width:100%;max-height:auto}
I don't know how and why this changes at 2.0.26d but if someone had a problem like i did can try this... if this change made by mistake plz fix it .
Thank you!!!