We are in the process of upgrading our VS2008 to the new SP1, but noticed a change in the csproj files for something that we can't find information on. Seems that the ProductVersion in the csproj file is changed from:
<ProductVersion>9.0.21022</ProductVersion>
to
<ProductVersion>9.0.30729</ProductVersion>
It looks like some property signalling that the csproj file is/can be consumed by VS 2008 SP1 (perhaps for the Solution Selector to peek into) but are there other hidden side-effects of this property change that we should be looking out for?