dmd 2.063 generated code a lot slower then dmd 2.062

[Benjamin Thaut]

Am 14.10.2013 10:56, schrieb Walter Bright:
> On 10/14/2013 12:24 AM, Benjamin Thaut wrote:
>> When
>> compiling the latest druntime with the latest dmd for windows 32-bit I
>> get the
>> following error message:
>>
>> lib\druntime.lib: Error: corrupt object module
>>
>> On windows 64-bit everything works fine. Any ideas why this happens?
>
> It means it isn't a correct 32 bit object file.
>

And what could cause this? I already tried manually deleting everything 
thats not checked into git. "make -f win32.mak clean" doesn't help either.