Ok, I've seen this error before but I can't figure out what's going on. The thing is, I have an identical site with the same DLL's and configuration not causing the error. Really could use help on this. Umbraco version is 6.1.6
Error parsing the XSLT:
System.ArgumentException: An item with the same key has already been added. at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) at umbraco.macro.GetXsltExtensionsImpl() at Umbraco.Core.Cache.HttpRuntimeCacheProvider.GetCacheItem[TT](String cacheKey, CacheItemPriority priority, CacheItemRemovedCallback refreshAction, CacheDependency cacheDependency, Nullable`1 timeout, Func`1 getCacheItem, Object syncLock) at Umbraco.Core.Cache.HttpRuntimeCacheProvider.GetCacheItem[TT](String cacheKey, CacheItemPriority priority, CacheItemRemovedCallback refreshAction, CacheDependency cacheDependency, Nullable`1 timeout, Func`1 getCacheItem) at Umbraco.Core.CacheHelper.GetCacheItem[TT](String cacheKey, CacheItemPriority priority, CacheItemRemovedCallback refreshAction, CacheDependency cacheDependency, TimeSpan timeout, Func`1 getCacheItem) at umbraco.macro.GetXsltExtensions() at umbraco.macro.AddMacroXsltExtensions() at umbraco.macro.GetXsltTransformResult(XmlDocument macroXml, XslCompiledTransform xslt, Dictionary`2 parameters) at umbraco.presentation.umbraco.developer.Xslt.xsltVisualize.visualizeDo_Click(Object sender, EventArgs e)
This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/63570-error-parsing-all-xslts