Simon Fell > Its just code
No HTTP compression for the .NET Compact Framework, this is seems like a strange move, its seems to me that PocketPC based apps have the most to gain from supporting this.
Looking at some User Agent stats from soap.4s4c.com I see that IE is advertising what updates/patches are installed, e.g. Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.0;+Q312461;+.NET+CLR+1.0.3705), I'm guessing that the presense of the Q312461 part means that the patch detailed in this KB article is installed. Seems like a great way to enable some targetted attacks, any requests to a server from IE without Q312461 in the user agent string is vunerable. [note to self, use Opera 6 by default]