The scrolling is working fine now on OSX Safari. OSX works because the scrolling does not bounce back like it does in iOS.
There is still a severe scrolling problem in iOS Safari, and it is very difficult to get to the part category icons:
The front page is okay now on iOS. After I log in, I am at the 'Electronic Components Search' page. On iPhone 5, when I scroll around on this page, it is jerky and the layout keeps snapping back to the search box, making it difficult to get to the part category icons. The only way to get it to not snap back is to start swiping up with one finger, and continue the swipe with a second finger. This is hard to discover, and I can have it snap back dozens of times before I remember the trick to get it to work. iOS version: iOS 8.0.2.
It is better in Chrome, but there is still an erratic transition between the full-screen big search box and big search button and the small search box and 'Browse by Categories.' Not unusable like Safari, though.