[quote user="GJT"]I have been reading about the IE Renderer upgrade and have attempted to determine what settings this 'problematic' user account has set. In doing so, I have disabled the IE Renderer setting which I presume default to BearHTML? and the problem no longer exists.... given that we do not have a reliance on Windows Internet Explorer for browsing and most of the PCs on the network have have not upgraded to IE 7.0 (we all use Chrome), perhaps this is the root of the problem?[/quote]
It's very likely IE 6 related, but here's making suggestions about dealing with such issues. Aside from this updating IE to the most recent supported version (IE 8 on XP) is always recommended for security reasons.
[quote user="GJT"]So, if I chose to apply the IERenderer .exe file - I cannot find an .exe. file of the same name in the Pegasus installation folder to overwrite...?[/quote]
Sorry, but did you happen to read the highlighted parts of the IERenderer update page (the same text is included on top of History.htm as provided with the EXE in the download archive)? Part of it says The download archive ... provides an installer ..., IOW: Running the EXE on you server should apply the update for you, and if this doesn't work the announcement also makes a suggestion (and provides a URL) about using an unpacker for doing it manually.
[quote user="GJT"]BUG : I have managed to recreate - if you 'Change User' and attempt to invoke the IE Renderer dialog from the toolbar button nothing happens....[/quote]
This is actually one of the reasons (along with more serious ones like crashes) why this feature isn't supported anymore (and was removed from the user interface) since v4.5, so don't expect to see any fixes if you continue using it.