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Editorial Team
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Asked: 2026-05-12T17:09:05+00:00

Visual Studio 2008 .NET 3.5 I’m using the built in web server to test,

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Visual Studio 2008
.NET 3.5

I’m using the built in web server to test, and everything works fine. My TinyMCE code is the following:

<!-- TinyMCE -->
<script type="text/javascript" src="/tiny_mce/tiny_mce.js"></script>
<script type="text/javascript">
    tinyMCE.init({
        // General options
        mode: "textareas",
        theme: "advanced",
        plugins: "paste",
        relative_urls: false,
        remove_script_host: false,

        // Theme options
        theme_advanced_buttons1: "bold,italic,link,unlink,image",
        theme_advanced_buttons2: "",
        theme_advanced_buttons3: "",
        theme_advanced_toolbar_location: "top",
        theme_advanced_toolbar_align: "left",
        theme_advanced_statusbar_location: "bottom",
        theme_advanced_resizing: false,

        // Example word content CSS (should be your site CSS) this one removes paragraph margins
        content_css: "includes/tinyMCEword.css",

        // Drop lists for link/image/media/template dialogs
        external_image_list_url: "lists/image_list.js"
    });
</script>
<!-- /TinyMCE -->

Now, the issue I’m having, is on any pages that I have this code, I’ll intermittently get ViewState errors, namely:

Event code: 4009
Event message: Viewstate verification failed. Reason: Viewstate was invalid.

I noticed when this happens, on top of my page, it looks like I have ViewState data (encrypted) being outputted. Only on pages with TinyMCE. I have no idea why it’s occuring. Everything works perfectly fine locally, but when deployed to a Win2K3 server (IIS6), I’m getting this issue.

I really am lost. Any ideas fellas?

Thanks,
-Steve

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1 Answer

  1. Editorial Team

    I’m having the exact same problem with my site. Part of the viewstate data is visible on top of page. Works fine locally. Even my javascript code is very similar to yours.

    Only happens on webkit browsers (safari/chrome).

    It seems that tinyMCE places a .js file (tiny_mce/themes/advanced/langs/en.js) randomly inside the viewstate, thus corrupting it.

    I tried different versions of tinyMCE, changed the javascript code. Nothing worked so far.

    Anyone have any ideas?

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