The suppression of the report by the U.S. is discussed rather vaguely by your sources, and I'm not seeing a lot of objectivity there either.

Islam Daily:

Authoritative sources directly involved in the matter revealed that the U.S. State Department had accused the UNDP of publishing "false accusations" against the U.S. in the third report, which is finalized and ready for printing. The report has been held up since October due to this political problem. Last year the U.S. cut its funding of the UNDP by $12 million, to $89 million, making it clear that the cut reflected its displeasure with some of the contents of the Arab Human Development Report (AHDR).

On the other hand, here's a press release from the UNDP itself:

While at different times concerns have been raised by some Governments about the content of the forthcoming report, no formal discussions on editorial content have taken place, no Government has asked for their suppression, and press reports that the US has threatened to cut future contributions to UNDP in relation to the upcoming report are inaccurate.

Guess you have to decide which source seems more authoritative.

Earlier reports can be found here.