Hi!
No problem at all. I think it’s caused by a browser styling attribute, but I think it’s possible to turn it off. Try to add these lines to the site’s main css file:
input {
-webkit-appearance: none !important;
border-radius: 0 !important;
}
Here is an article about it: http://stackoverflow.com/questions/2918707/turn-off-iphone-safari-input-element-rounding
Unfortunately I’m not available for a custom job, sorry 🙂 I wish I had more time.