Emulator

What's the problem?
Loading many games in cISO format results in a black screen. Converting these cISO images to regular 4.3gb ISO files results in successful loading and emulation.

Dolphin version with the problem (as it appears in the title bar, Ex.: "R
4779" or "R 6403M"):
7344

(optional) Dolphin version that does not have the problem:
None, went back to when cISO was first committed R6685 and the problem is present.

Operating system and version: Windows 7 Professional
32-bit or 64-bit: 64bit

Game ID (as it appears in game properties, Ex.: "GZ2P01" or "RSBE01"):
RMGE01

Build command-line (not on Windows):

Was the ISO a plain dump from disc, compressed and/or scrubbed?
It is an ISO I dumped myself and converted to cISO for storage. Converting back to ISO works fine, so there is no loss or "damage" to the file from the ISO->cISO->ISO conversion.

Please provide any additional information below.
Twilight Princess is the only game I own that works from cISO. Super Mario Galaxy and it's sequel both fail, as does Smash Bros. Brawl.