My ghci installation has a very annoying behavior: When it takes input, the result is displayed on the same line as the input, overwriting the prompt and input. Viz.: [1015] : ghci GHCi, version 6.10.4: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer ... linking ... done. Loading package base ... linking ... done. 7relude> 3 + 4 Prelude> Note the 7 that overwrites the P in Prelude. I have had several prior versions of ghci installed, most recently 6.10.1, and they never had this problem. (In other words, I saw: Prelude> 3 + 4 7 Prelude> Those prior gchi's were installed from the GHC binaries. Most recently I decided to give Haskell Platform a try, and I installed that. That is the point at which this behavior started. My environment: Haskell Platform 2009.2.0.2 GHC 6.10.4 (installed w/Haskell Platform) Mac OS X 10.6.1 Oddly, I have GHC 6.10.4 installed from GHC binaries on a Mac OS X 10.5 machine at work, and the newline behavior is correct. So the issue could be Haskell Platform vs. GHC installs... or it could be 10.5 vs. 10.6 Anyone seen anything like this? - Mark