I have a reusable workflow created in SPD 2010. The workflow is generating an email that has a link to a document in a document library. The file name of the document contains spaces (e.g. my docment.docx). When I click on the link in the email to the document on a PC with IE7, the URL is encoded and the spaces replaced with %20. The document is displayed correctly. When I click on the link in the email to the document on a PC with IE8, the spaces are removed from the URL instead of it being encoded and a 404 error is displayed in the browser because the document cannot be found.

I’ve narrowed down what I believe is causing this to happen but still need help with a solution.
In the reusable workflow, when I try to add the current item URL to the email the Data Source – Current Item does not have a Field called Encoded Absolute URL like it does for List workflows. Because of this I used Workflow Context as the Data Source and Current Item URL as the Field to add the URL to the email. SP does not encode Workflow Context - Current Item URL. Therefore, displaying the document from the email in IE8 fails.

I have several questions.
Is Workflow Context – Current Item URL the correct field to use in this situation?
If Workflow Context – Current Item URL is the correct field, how can I encode it in SPD?
Is there a way to force IE8 to encode the URL?

I’m not a developer so I’d like to be able to resolve this issue without modifying the workflow in Visual Studio.