I will try and make this as straightforward as possible; my apologies if I am not successful!
At my company, we have been battling fairly severe timeout issues with SharePoint 2010 in Internet Explorer. The timeouts have been occurring only in IE, and we have tried everything mentioned in my previous thread here, with no success in solving the problem: http://social.msdn.microsoft.com/Forums/en-US/571291bd-7fa3-47e1-8fdd-f047ea3d13c4/sharepoint-2010-timeouts-in-ie
Other projects were going on, and so we all just kind of tolerated it for a while, but now the urgency to solve this issue has returned. Users have lost data while working in SharePoint due to timeouts while saving their work. In addition, now our SharePoint sites are randomly prompting for credentials and not always accepting the correct ones when entered. The credential prompts are occurring in both IE and FireFox. Both issues are happening across all sites in our farm, and I can't help but wonder if they are somehow related. The odd thing is that we never got credential prompts before, and we haven't changed anything about our farm or server setup/config other than adding some physical memory to the server itself. The prompt issues also started before the memory upgrade, ruling it out as a possible cause.
Here is a quick summary of our system setup:
Application server running SharePoint 2010
DB server running SQL Server 2008 R2
Web server running Windows Server 2008 R2
All of our web apps are running NTLM authentication, with one of them running claims-based NTLM with FBA enabled, and the rest running standard NTLM. The issues are happening across all web apps.
We know the memory/CPUs are sufficient, because they were just upgraded as stated.
Our System Admin was working with me on this, and now he has gone to a customer site so I have most of the responsibility to look into it. I know my way around CA and Windows Server in general pretty well. Other than that though, I'm a developer and not an admin, so I confess myself to be a bit of a fish out of water.
Any suggestions of things to check or try would be greatly appreciated! I plan to try and do more network monitoring with the F12 developer tools, but we have used Fiddler and the like already with no helpful results coming up. We have tried a lot of things already - you name it, we've probably tried it - so I am really at a loss at this point.
Thanks in advance!