Today a couple of days before upgrade Umbraco from 4.7.1 to 6.2.6 I found that my UrlRewriting rules don't work.

It is so interesting because I can't find any problems like this in Google.

My rules looks like:

<add name="ByPageOrImage" virtualUrl="^~/([^,]+),(\d{1,10})\.aspx" rewriteUrlParameter="ExcludeFromClientQueryString" destinationUrl="~/default.aspx?umbPage=/$1.aspx&amp;page=$2" ignoreCase="true" />

As you can see the destination url contains ~/default.aspx?umbPage= what is very obsolete.

This rule should look like:

<add name="ByPageOrImage" virtualUrl="^~/([^,]+),(\d{1,10})\.aspx" rewriteUrlParameter="ExcludeFromClientQueryString" destinationUrl="~/$1.aspx?page=$2" ignoreCase="true" />

I found in source codes comment like this:

// note: requestModule.UmbracoRewrite also did some stripping of &umbPage // from the querystring... that was in v3.x to fix some issues with pre-forms // auth. Paul Sterling confirmed in jan. 2013 that we can get rid of it.

So the old umbPage param was used in v3 version and now doesn't exist.

It is so funny because it was working a couple of years without any problems.