The Host Integration Server Product Team has just released the first Cumulative Update (CU) for HIS 2010. The cumulative update model is something that SQL Server and Biztalk Server also use to package and release product fixes on a more consistent schedule.
HIS 2010 CU1 includes fixes for HIS 2010 that were fixed after the release of HIS 2010. Details on the included fixes can be found in the following Knowledge Base article:
2533330 Cumulative update package 1 for Host Integration Server 2010 http://support.microsoft.com/default.aspx?scid=kb;EN-US;2533330
There are some additional fixes that are not yet listed in this KB article because the KB articles for those specific fixes are not yet completed. Once these other KB articles are completed, article 2533330 will be updated to include links to those articles as well.
You can download HIS 2010 CU1 via the View and request hotfix downloads link in the KB article. You would need to download the CU1 package that matches the HIS 2010 version (x86 or x64) that you have installed.