Gnucash start-up error, mcount: tos overflow

[Jesse Sinclair]

Every time I start Gnucash I get an mcount: tos overflow error,  
Gnucash then starts up properly. After closing a gmon.out file is  
written, but I can't open it (even with gprof). Anybody else having a  
similar issue? Advice on where I should start in order to fix this?  
I've built Gnucash 2.05 on an iBook G4 running 10.4.9 using macports.  
All ports installed are up to date; slib 3a3 and guile16 are  
installed. Thanks.