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cygheap base mismatch detected

I've been running into a strange "error" lately (that is, I first
noticed it for sure on 1.7.10, but it MIGHT have occurred also on 1.7.9.
It persists on 1.7.11). cygcheck -- and *only* cygcheck -- is reporting
a cygheap base mismatch but only on an XP64 machine:

$ cygcheck -cd cygwin
      1 [main] cygcheck (3756) C:\cygwin\bin\cygcheck.exe: *** fatal
error - cygheap base mismatch detected - 0x61270870/0x2170870.
This problem is probably due to using incompatible versions of the
cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.
Cygwin Package Information
Package              Version
cygwin               1.7.11-1

(Note that cygcheck actually *does* complete the requested command,
after the error message from (cygwin1.dll/ is printed.

However, a full search of C:\ shows no other cygwin1.dll except
C:\cygwin\bin.  An explicit search of every directory in $PATH also
shows no cygwin1.dll except the expected one.

Similarly, I *can* run cygcheck -svr -- it just complains before
printing the requested info.  See attached [slightly redacted]. (Note
again, only one cygwin1.dll present).

I don't see this behavior on other (XP32) machines on the same network.
Any idea what's going on?  Could it have something to do with operating
under WOW64 (as 32bit cygwin must)?


Attachment: cygcheck.txt
Description: Text document

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