Shortly after it was released, the F# September 2008 CTP has been updated. This is a minor update, which is supposed to address some issues left open in the CTP released a week ago. "Support for units of measure on decimal types was limited in the first CTP release, and this has now been addressed", according to Don Syme, a researcher on the F# team.
Don lists the following issues to be fixed with the update:
Type abbreviations to floating point types involving units don’t behave correctly
Quotations.Expr.TupleGet gives exception on zero index
CodeDom invocation of compiler should use '--nologo'
Decimal<kg> doesn't support operators
Sequence expressions involving 'let' and 'use' dispose of enumerator too eagerly
Evaluation of a valid quotation expression doesn’t succeed (reported by Credit Suisse)
Base variables in object expressions do not follow the same rules as base variables in class types
The download link for F# September 2008 CTP has remained unchanged, but the download installer has internal version 1.9.6.2 instead of 1.9.6.0.