You might be right about the problem being in the the underlying iOS web support because it is a problem with any web browser on the iPad. The only way around it is not to use the iPad to access these sites. I actually use SplashTop to run Internet Explorer on my notebook to access these sites (there's also the option of actually sitting at at the notebook of course).
The same goes for web browser crashes on my iPad 1. I thought that it was just Safari but I have since found that other browsers crash too. The iPad is otherwise quite stable.