Fosters has announced it is going to revert back to 375ml bottles for some of its brews, due to a customer backlash:
http://www.news.com.au/business/story/0,27753,25099816-31037,00.html
Personally, I stopped drinking Cascade Premium when they reduced the alcohol content to a piss-ant 5%.
IMHO Premium should be at least 5.2%, if not 5.6% or 5.8%.
this seems to have been the trend lately.
Stopped drinking Southwark Premium for the same reason, the taste really suffered on my palate when they dropped the % alcohol . I know they do it to keep taxes down, but I'd pay more for "REAL" premium beer.