Snort is not starting in amd64 - gutsy

Binary package hint: snort

Upgraded with adept-manager --dist-upgrade last night.

snort version installed: 2.7.0-2ubuntu1.

installed: snort, snort-common, snort-rules-default, snort-mysql

after installing and adapting config file for the new dynamic preprocessors, snort fails to start with:

Oct 5 01:50:20 azrael snort[29203]: FATAL ERROR: Failed to load /usr/lib/snort_dynamicengine/libsf_engine.so: /usr/lib/snort_dynamicengine/libsf_engine.so: wrong ELF class: ELFCLASS32

The snort.conf line affecting this behaviour is:
###################################################
# Step #2: Configure dynamic loaded libraries
#
# If snort was configured to use dynamically loaded libraries,
# those libraries can be loaded here.
#
# Each of the following configuration options can be done via
# the command line as well.
#
# Load all dynamic preprocessors from the install path
# (same as command line option --dynamic-preprocessor-lib-dir)
#
dynamicpreprocessor directory /usr/lib/snort_dynamicpreprocessor/
#
# Load a specific dynamic preprocessor library from the install path
# (same as command line option --dynamic-preprocessor-lib)
#
# dynamicpreprocessor file /usr/lib/snort_dynamicpreprocessor/libdynamicexample.so
#
# Load a dynamic engine from the install path
# (same as command line option --dynamic-engine-lib)
#
dynamicengine /usr/lib/snort_dynamicengine/libsf_engine.so
#

Same happens with the files in /usr/lib/snort_dynamicpreprocessor/

the file command shows:

libsf_dcerpc_preproc.so.0.0.0: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), stripped
libsf_dns_preproc.so.0.0.0: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), stripped
libsf_ftptelnet_preproc.so.0.0.0: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), stripped
libsf_smtp_preproc.so.0.0.0: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), stripped
libsf_ssh_preproc.so.0.0.0: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), stripped

looks like the dynamic libs provided with snort in amd64 architecture are i386 versions.