Today when I logged into Gmail, I suddenly found that except inbox other link all use capital letter for the first letter (inbox instead of Inbox). See below.

After 1 day work, I found so many people now realised this annoying or interesting phenomenon. There is a thread in Google forum, there you will find that when you compose a new email, to and from also use lower case letter.( http://groups.google.com/group/Gmail-Help-Reading-Messages-en/browse_thread/thread/89ec2d34aa580d2d?pli=1 ) And someone even noticed that his/her Friends folder in Contacts now also turn to be friends, but Family etc still the same.

Solution for this: change your language settings from English UK to English US. Feel like this is kind of discrimination. People who noticed this issue will definitely ask why it is like this. Anyway…treat it like a April fool’s joke.