Same issue here.
Windows 7 64bit and 32bit with Akai LPD8 controler as input only. Haven't tested other controlers, looks like it's not due to a specific controler.
I got a window "wish error" "fail to register window class" or something like that.

pob

On 08/10/2011 21:59, Joe Newlin wrote:

Tested with Korg Nano Kontrol & then with Akai LPK-25 as MIDI Input Device 1 (and only) on Windows 7. Pd immediately crashes when any MIDI input is sent. No patch necessary to crash, it will do it with just the PD message window open, though it will also crash with a patch open, e.g. testtone.pd.

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