Why does my keyboard switch language in most input fields on the web? I'm basically using US keyboard as my default, but I also have enabled Czech (QWERTY), which has quite different layout for when I need those special characters.

The problem is, that in the past few days whenever I put focus in a password field in Google Chrome, it automatically switches from the US to Czech and I can't switch back, as it is grayed out.



But once I click out of the password field, I can change it back without any problems. What could possibly cause this? I'm using OS X 10.6.6 on Macbook Pro if that's of any relevance.
I've had weird input-switching behavior before when the keyboard shortcut to switch input sources was the same as something else I was using, like Quicksilver.  Try disabling or changing the relevant shortcuts in System Preferences (under Keyboard &amp; Text Input).

UPDATE: Detailed instructions:


Open System Preferences
Open the Keyboard preference (under Hardware)
Select Keyboard and Text on the left
Find "Select the previous input source" in the box on the right and uncheck it.  Its shortcut was probably set to Command-Space.