I am seeing the same issue with banshee whilst not connected to the internet the Ubuntu One extension causes either banshee to crash or to start taking all system resources:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
7507 steve 20 0 2062m 96m 42m S 341 2.4 1:36.42 banshee
1821 steve 20 0 828m 272m 45m R 11 6.9 17:25.95 compiz
1272 root 20 0 195m 69m 18m S 1 1.8 17:13.83 Xorg
I am seeing the same issue with banshee whilst not connected to the internet the Ubuntu One extension causes either banshee to crash or to start taking all system resources:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
7507 steve 20 0 2062m 96m 42m S 341 2.4 1:36.42 banshee
1821 steve 20 0 828m 272m 45m R 11 6.9 17:25.95 compiz
1272 root 20 0 195m 69m 18m S 1 1.8 17:13.83 Xorg
Log attached for banshee started with --debug