Citrix GoToWebinar

[#1]

I have two datalinks one from Demon and one from Plusnet ( Business option 3) into a dual port firewall.
When the data for Citrix Webinars (GotoWebinar) is streamed via PN I get to see corrupted data artefacts on the screen. With Demon there is no problem. Both links are about the same speed (7Mbps).
Anyone else have similar problems?

[#2]

I've not seen anything like this reported.
Can you get a Wireshark capture for us and attach it to a ticket when this is happening?
I appreciate the nature of the product means it's not ideal to run, but we certainly want to see what may be causing this.
Do you see any other issues with the service?
Jitter in streaming, voip or any other realtime services?

[#3]

Okay I'll try that, but it may take a while before I can produce results.