I installed Umbraco 4.7.1.1 in virtual directory, most part runs fine until I encountered a very weired bug.

Some of my background settings, I have a web site named https://my-site.com, there is a physical folder named "information" and I created a virtual directory named "SubSite" inside information folder, so the complete path look like: https://my-site.com/information/SubSite for content and https://my-site.com/information/SubSite/umbraco for backoffice.

I have made change to web.config:

    <add key="umbracoReservedPaths" value="/information/SubSite/umbraco,/information/SubSite/install/" />

    <add key="umbracoPath" value="/information/SubSite/umbraco" />

The problem happens in backoffice content section. I have uploaded some images to media library, some of them are big pictures while some of them are just icon size. In the content editor I insert image by using Insert/Edit Image botton in TinyMCE's toolbar, and pick from media library.

The problem I have is:

• For all large size images, the path is prefixed with "/information/SubSite" thus they are displayed properly;
• BUT for icon or small size image, when I pick from media library the "/information/SubSite" is there, after I save the content the prefix is gone! So the image is always not available. I have to select the missing picture in content editor again, click "Insert/Edit Image" button on toolbar one more time, it brings up the insert picture dialog box, from there I have to manually type in  "/information/SubSite" in the URL box and save content, then I can see it appears.