The most stable and tested version of formsPlayer is 1.4.3.1040. This is the version that will be automatically installed for your users if you place the lib-xh script into your applications, and is the version we recommend you use if you have a commercial license.
If you do not have a commercial license linked to in your forms, then users viewing your forms with formsPlayer 1.4 will see the formsPlayer branding. To avoid this, have your users install version 1.5.4.1006. This can be done either be referring them directly to the download page, or by adding a minimum version requirement to your forms before the reference to lib-xh, as follows:
<head>
<title>My XForm</title>
<script type="text/javascript">
var sLatestFpRelease = "1,5,4,1006";
</script>
<script src="http://lib-xh.googlecode.com/svn/trunk/xH.js" type="text/javascript">/**/</script>
</head>
In addition to the two versions mentioned above, we will often make interim builds available which will preview new features. These are aimed at developers, and may not always contain the latest bug fixes. However, if they contain a feature that you need then you will almost certainly find them useful, and as you evaluate the new features we'd appreciate feedback on performance and bugs. The latest interim build is 1.5.5.1017, which supports re-architected select and select1 controls.