I have the same problem  running on iis 6 tho

I also get this error:

Error occured

System.NullReferenceException: Object reference not set to an instance of an object. 
at umbraco.macro.GetXsltExtensionsImpl() 
at umbraco.macro.b__0() 
at umbraco.cms.businesslogic.cache.Cache.GetCacheItem[TT](String cacheKey, Object syncLock, CacheItemPriority priority, CacheItemRemovedCallback refreshAction, CacheDependency cacheDependency, TimeSpan timeout, GetCacheItemDelegate`1 getCacheItem) 
at umbraco.macro.GetXsltExtensions() 
at umbraco.macro.AddMacroXsltExtensions() 
at umbraco.presentation.webservices.codeEditorSave.SaveXslt(String fileName, String oldName, String fileContents, Boolean ignoreDebugging)

When trying to save a xslt file

Sorry to bump, but same problem. Cannot create xslt in umbraco 4.8. Completly clean and fresh install on new server, permissions wide open for testing. Cheers.

Same problem here:

Add the below code in webconfig and create new folder legacy and copy old Lucene.Net dll and remove App_global.asax.dll 

<assemblyBindingxmlns="urn:schemas-microsoft-com:asm.v1">
        <dependentAssembly>
                <assemblyIdentityname="Lucene.Net"/>
                <codeBaseversion="2.9.2.2"href="bin\legacy\Lucene.Net.dll"/>
                <codeBaseversion="2.9.4.1"href="bin\Lucene.Net.dll"/>
        </dependentAssembly>
</assemblyBinding>

Hi, I'm having the same problem with a fresh 4.8.1 install and the Lucene fix applied.

Does anybody have any idea ?

Thanks

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