This question is baffling to say the least, as I'm just not sure how to diagnose where the problem is happening.
Here's the problem: when I am connected to my network in the office (but not on other networks), the iPads or iPhones (all running latest iOS) sometimes don't show all of the images in Safari, and you have to reload the page (sometimes several times) to get all of the images to load. This was never an issue with prior iOS builds (prior to version 5).
This never happens on any other network - for example at the Apple Store, or cafe wifi networks.
Our office setup is as follows:
D-Link 4 Port Modem Router DSL-526B connected to ADSL2+ service
D-Link NetDefend SOHO UTM Firewall DFL-160
D-Link 16-Port WebSmart Gigabit Switch DGS-1210-16
Nothing has changed with the aforementioned setup between going from iOS 4 to 5. And we're seeing it with both iPad 2s and 3rd-generation iPads and with iPhone 4/4S
What could be happening for this to be a problem with our network? We don't have any issues with our Macs.