LW 5.1 does not have chat abilities. Also cannot browse uploaders (unless using Friends option). LW 5.2 beta is presently experimenting with putting back in ability to browse uploaders.

LW 5.1 did not please me because I spend much of my time browsing uploaders using LW 4. Uploaders share similar files to me in many cases so ...

LW took out many of LW 4's tools when they built LW 5. They are slowly re-adding them back with later releases. I felt LW 5 was released far too soon. It should have remained in alpha stage but they seemed in too much of a hurry to 'push' it onto users. Doing so actually caused users a lot of problems.