I've just noticed that the Attachment.Save doesn't work correctly. I'm using the InTheHand 4.0 version and also use the workaround below:

 oAttach.GetType().GetMethod("OpenNativeAttachment", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance).Invoke(oAttach, null);

 

Is this a known issue?

That workaround is no longer required. The current version is 4.1. Attachment.Save works so long as the attachment is fully downloaded, otherwise it will throw an InvalidOperationException. You can check the download state with the DownloadState property. If you want to force retrieval of an Attachment call its RemoteDownload() method then do a Synchronize() on the account.

Peter

I'm having the same problem with this, and I'm using 4.1.
I didn't see this thread before, so I started this one: http://inthehand.com/forums/p/3481/10221.aspx
Sorry for the annoyance