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Description of problem:
from glibc changelog:  
  
* Sat Jan 07 2006 Jakub Jelinek <jakub> 2.3.90-29  
- update from CVS  
  - make pthread_mutex_t an unnamed union again, as it affects  
    libstdc++ ABI mangling  
  
looks like boost-1.33.1-4 was built against the bad glibc. any programs 
calling boost::condition::wait() or friends fail to link when compiled with 
the good glibc (either older or current) headers 
 
a rebuild of the boost.src.rpm fixed the problem for me. 

Version-Release number of selected component (if applicable):
boost-1.33.1-4

How reproducible:
Always

Steps to Reproduce:
1. compile & link a program which uses boost::condition 
   

Actual Results:  link error  

Expected Results:  world peace  

Additional info:

please rebuild