Shadows created in iWeb are turned into bulky boxes – a recent flaw not experienced before. (Clearing cache didn't help)
When I first tried Firefox instead of Safari, shadows around non-rectangular objects no longer followed the contour, but shadows around rectangular objects looked fine (same as in Safari.) Now, for no apparent reason, shadows have become big grey rectangles, making the site look amateur and childish, though it still looks fine in Safari.
Alla svar (1)
That is unfortunately a bug (Bug 662898) that slipped into Firefox 5 and that will be fixed in Firefox 6, due to be released in August.