Mac OSX Mountain Lion kills fastboot : « ERROR: Unable to create a plug-in (e00002be) »

After upgrading to Mac OSX Mountain Lion (10.8), the fastboot command does not work anymore, making it impossible to flash custom roms from OSX Mountain Lion.

Here is an extract of what happens when trying to use the fastboot command from OSX Mountain Lion command shell :


droid $ fastboot erase cache
ERROR: Unable to create a plug-in (e00002be)
< waiting for device >
ERROR: Unable to create a plug-in (e00002be)
ERROR: Unable to create a plug-in (e00002be)
ERROR: Unable to create a plug-in (e00002be)
ERROR: Unable to create a plug-in (e00002be)
ERROR: Unable to create a plug-in (e00002be)
ERROR: Unable to create a plug-in (e00002be)
^C
droid $


The workaround I've found so far is using the fastboot command from previous versions of Mac OSX : Lion (10.7.x) or Snow Leopard (10.6.x).