See below text from the Dinan site regarding the ECU upgrade for the 135/335/535. This certainly adds credibility to this issue. Hope it gets resolved soon as I intended to pull into my nearest Dinan dealer at mile 1,201.
"Currently, Dinan software is applicable for vehicles equipped with the MSD v80.0 DME (engine management computer). Vehicles equipped with the MSD v81.0 DME are not yet supported. For the most part, the production date break appears to be 3/08, however this is not an absolute so it is best to check the DME label. "
135i Coupe .. Titanium Silver .. Coral .. 6 Speed .. Sport .. Cold Weather
* Ordered: April 7
* Production Completed: April 16* Delivered: May 10th