runtime error on maxima/sbcl



Hi!

I have been using maxima before and after some initial problems everything was 
running fine. Now I got a problem, I am not able to solve.

After updating my system, I discovered after a time maxima produces an error 
on startup, that should be known to those who are using it more often than I 
do:

---snip---
> maxima
fatal error encountered in SBCL pid 4595(tid 3085163232):
can't load .core for different runtime, sorry

Welcome to LDB, a low-level debugger for the Lisp runtime environment.
ldb>
--snap---
Using maxima 5.14.0 from gentoo-overlay 
flags: sbcl tk unicode

sbcl 1.0.13 (1.0.9 tested producing the same error)
flags: doc ldb source threads unicode

I tested to ship around this by for example using gcl, but it does not compile 
then. 

Is there anybody who can help me?