Difference between v4.0 beta 3 & 4 UM

can you tell me how to assign profiles to users? in my UM i cannot find any options for this..

NAME VERSION SCHEDULED

0 system 4.0beta4
1 user-manager 4.0beta4
2 ups 4.0beta4
3 synchronous 4.0beta4
4 security 4.0beta4
5 routing 4.0beta4
6 routerboard 4.0beta4
7 radiolan 4.0beta4
8 ppp 4.0beta4
9 ntp 4.0beta4
10 multicast 4.0beta4
11 mpls 4.0beta4
12 lcd 4.0beta4
13 isdn 4.0beta4
14 X ipv6 4.0beta4
15 hotspot 4.0beta4
16 gps 4.0beta4
17 dhcp 4.0beta4
18 calea 4.0beta4
19 arlan 4.0beta4
20 advanced-tools 4.0beta4
21 wireless 4.0beta4

& this bugs r still there