When using Vista + Flash10 the browser defaults to the Flash (multi)upload component.
When selecting some files and starting an upload the progressbar stops at 0% upload and nothing seems to happen. The files are however created on the server and PARTLY uploaded...?

I have'nt tested Flash 10 in XP.

Tested:
Opera + Flash 10 under Vista = no go.
Firefox 3 + Flash 10 under Vista = no go.
IE7 + Flash 10 under Vista = no go.
Firefox 3 + Flash 9 under XP = ok.
IE7 + Flash 9 under XP = ok.
Google chrome + Flash 9 under XP = ok.

By the way;
I translated the new versions of the Image- and FileManager into Dutch (uploaded them to your i18n support pages) you can contact me for future translations as we use your plug-ins in our Dutch commercial CMS.