Emulator

Game Name?
Tested Just Dance 3 (U), Just Dance 4 (U), Super Smash Bros Brawl (U) and Monster Hunter Tri (U)

What went wrong?
Games that have some kind of Nintendo WFC support started to trigger errors like "NAND content not valid for TitleID 00010005\7xxxxxxx" since 3.5-205 (r67d0e66af4fc) and became terribly slow after the merge of 3.5-438 (rca4ea817e094)

What steps will reproduce the problem?
Starting with 3.5-205 (r67d0e66af4fc), all Wii games that have some kind of DLC support will show an error when booting (something like "NAND content not valid for TitleID 00010005\7xxxxxxx"). Not a big issue, pressing Yes the game will continue without issues.

However, after the merge of 3.5-438 (rca4ea817e094), all Wii games will run terribly slow (FPS 1-10) unless you turn of Idle Skipping. Even games that doesn't have Nintendo WFC features were affected.

What version of Dolphin were you using?
3.5-205 (r67d0e66af4fc) and 3.5-438 (rca4ea817e094)

64 or 32 bit Dolphin?
Both 64 bit

What version of Dolphin used to work?
Any version before 3.5-205 (r67d0e66af4fc) doesn't have the NAND Content error. Any version before 3.5-438 (rca4ea817e094) doesn't suffer the huge slowdown.

What Operating System were you using and what are your hardware
specifications?
CPU: Intel Core 2 Duo E4500 @ 2.2GHz
RAM: 2GB DDR2 @ 667
GPU: nVidia GeForce GT440 @ 1GB DDR3
OS: Windows 8 (RTM) [x64]

Any other relevant information or links to logs:
Disabling Idle Skipping fixes the slowdown issue in builds made after 3.5-438 (rca4ea817e094)