id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
2791	Allow two versions of GHC to be installed simultaneously with the OS X installer	igloo		"Currently, for some people at least, installing a 6.10 series OS X installer will remove the 6.8 series GHC. We'd like it to leave the old one there (although the symlinks for commands like `ghc` will no longer point to it).

More details are in this thread:
http://www.haskell.org/pipermail/glasgow-haskell-users/2008-November/015904.html
"	bug	closed	low	7.0.1	Build System	6.8.3	fixed			Unknown/Multiple	Unknown/Multiple	None/Unknown	Unknown