.NET Framework 3.5 SP1 (Service Pack 1) changes to ViewState causes stability issues in Sitecore products

I just received the email below from Sitecore regarding stability issues that .NET Framework 3.5 SP1 (Service Pack 1) is causing with all Sitecore products. I am glad they sent this out. Hopefully the companies using Sitecore products will see it before they install the Service Pack and lose a lot of time with the issues it is causing.

There are a couple questions that come to mind, but the first one is this the only product that will have problems?

If you are using a product that is built on top of ASP.NET you may need to be very careful. The bug described and the issues with it have not been reported specifically yet. It has simply been described as a "bug in the LosFormatter class (System.Web.UI.LosFormatter in System.Web.dll, used to serialize and deserialize an ASP.NET ViewState)."

It would be interesting to know if any other products have problems, if you know of any others let us know, via comments.

My most important question though is, could this have been caught in the Beta cycle? Or is this a bug/change put in place since the last Beta release?

Why change how ViewState is serialized and deserialized anyway? πŸ™‚

ASP.NET MVC is looking more interesting all the time. Just have to wait for the rest of the marketplace to get it integrated into their products. πŸ™‚

Here’s the email:

Dear Sitecore Enthusiast,

You are receiving this message because you are subscribed to the Sitecore Product Issues and Patches mailing list.
On Monday, August 4th, Microsoft released the following service packs: Visual Studio 2008 SP1 and .NET 3.5 SP1.
Sitecore has discovered that these service packs introduce a bug in the LosFormatter class (System.Web.UI.LosFormatter in System.Web.dll, used to serialize and deserialize an ASP.NET ViewState). This bug causes stability issues in Sitecore products. Sitecore has raised this as an urgent priority issue with Microsoft (case number : SRQ080813600454) and is working to help resolve this issue.
In the meantime, PLEASE DO NOT INSTALL .NET 3.5 SP1 and Visual Studio 2008 SP1 on any server running a Sitecore product (including Sitecore WCMS, Intranet Portal, and Foundry) until further notice!
Symptoms associated with installing either of these service packs:

  • Memory consumption increases dramatically and single core CPU usage goes up to 100% when opening the Access Viewer or Media Library applications.
  • OutOfMemoryExceptions thrown in the Desktop and Content Editor.
  • The browser becomes unresponsive when accessing Sitecore.

Please be aware that Microsoft may include this Service Pack as part of the monthly ‘Patch Tuesday’. Please take steps to avoid the automatic installation of these service packs.
Please be aware that the final version of SQL Server 2008 will require .NET 3.5 SP1.
If you have any questions about this issue, please contact Sitecore support.
Best Regards, Sitecore Support Team.

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