Great news! 
We have swapped out the rich-text editor in SALC for a new, completely cross-browser and faster loading rich-text editor. This solves all RTE compatability issues that existed before, so the rich-text editor (seen throughout the BackOffice) now works in all major browsers.
Also, all display issues that we're aware of which made using Firefox, Safari or Chrome a pain in the #%!$ to use with the BackOffice are now solved.
All of this is available in SALC version 1.5.8 which updates automatically today.
Here's the NEW working status of each browser in relation to Shop a la Cart (version 1.5.8 ):
Internet Explorer (ver.6 and up), Mozilla Firefox (v.2.0 and up),
Google Chrome (v.0.2.149 and up), Safari (v3.1.2 and up):- No compatibility or display issuesIMPORTANT: If you have used the SALC BackOffice recently with an unsupported browser and still see any display issues, make sure to CLEAR YOUR CACHE to refresh the code on the page. Old compatability issues can be pretty "sticky".