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I have been told it will be fixed by Friday which is tomorrow.

I asked seomoz on twitter and included the CEO in it.

Thank you for the update but it doesn't bode well considering its one of the core features of SEoMoz Pro.

The Keyword Difficulty tool is currently unresponsive due to difficulties with real-time rankings retrievals. We apologize for the inconvenience and are working to fix it.

I have been getting this message for the last week.

This tool is the most important tool i use with seomoz subscription.

Roger fix the problem!

Hello Guys,

Please someone explain  how the keyword difficulty tool works and decides the difference super competitive v easy to rank keyword.

Also the performance of this tool has been really bad since August i have been getting errors i.e. try again in 20 minutes.

Thank you in advance for your replies