I have just started using Adobe Reader X - I find is very annoying, that the user-interfaced has changed once again - without improving the functions or usability, without any obvious purpose - just changed
this has happend every "new release" since Reader 6 one have to adopt new positions of the same functions and tools
example, in Reader X the search function has been disabled - now you have to activate the search function before being able to search, search bar can not even be selected as a default setting in the toolbar, if I want this
it is OK to add other functions, but not in favour of the basic functions that people already are used to have available
Reader X seams from my point, faster but more complicated and useless - not the simple tool is it is surposed to be "a reader"