Npgsql 1.0 RC3 is released!
Download it here
This release fixes some critical bugs with concurrent connection stablishment and "This stream does not support seek operation" error when sending a query. Please, have a look at release notes here for more information about there errors.
We are almost finished with 1.0. We hope to have a 1.0 final really soon so we can get 100% concentration on ado.net 2.0 features.