Upon investigation, I discovered a few significant bugs in SWFAddress that specifically affect IE-based browsers. These issues were observed in both SlimBrowser (with 15,000,000 downloads on Cnet) and Avant (also with several million downloads on Cnet).
Both bugs manifest when attempting to return to the original startup screen of a flex app using the back button. They can easily be replicated by utilizing the pre-compiled sample Flex app included in the latest SWFAddress 2.4 full download, as well as recompiling it or trying other flex apps.
Bug 1: When launching SlimBrowser and opening the SWFAddress Flex sample app in a single tab (ensure all other tabs are closed), navigating through the sample app's menu bar to another screen and then closing the browser window tab will cause the browser to crash.
Bug 2: By modifying the code for the starting page of the Flex sample app to include a hyperlink to an external website, returning to the initial page using the back button after visiting a different page within the sample app disables the back button on the external site, preventing users from returning to the Flex sample app.
I could attempt to debug this myself, but I wanted to inquire if anyone else would be willing to assist. Is there still active maintenance for SWFAddress, and do the developers address these types of issues? It is possible that support has been discontinued due to a reluctance to deal with IE-related problems, even though many third-party browsers rely on the IE engine without being directly associated with Microsoft.