Problem with ghc-6.5.20061008 on Mac OS X Intel

Hi, I was able to build this release using the 20060915 Intel build that's available, on 10.4.8. ghci seems to work OK (except for Readline), but an attempt to compile gives: $ ghc example25.hs /usr/bin/ld: Undefined symbols: _mtlzm1zi0_ControlziMonadziState_evalStateT_closure _mtlzm1zi0_ControlziMonadziState_gets_closure _mtlzm1zi0_ControlziMonadziState_zdf1_closure _mtlzm1zi0_ControlziMonadziState_zdf7_closure _mtlzm1zi0_ControlziMonadziState_zdf9_closure _mtlzm1zi0_ControlziMonadziWriter_zdf5_closure _mtlzm1zi0_ControlziMonadziWriter_zdf7_closure collect2: ld returned 1 exit status This didn't happen before. Any ideas? Am I doing something wrong, or is there something wrong with the 20061008 snapshot? Thanks, Deborah