1.5.16-1: chmod problem

[Pach Roman (GS-EC/ESA4) *]

Hello,
the following commands run properly on the c:/drive
 
c> touch yahoo
c> ls -l yahoo
   -rw-rw-rw-  1 ropach mkpasswd 0 Apr 28 13:54 yahoo
 
c> chmod -w yahoo
c> ls -l yahoo
   -r--r--r--  1 ropach mkpasswd 0 Apr 28 13:54 yahoo
 
but if I try it on the u:/ drive connected over net the following error comes

u> ls -l yahoo
   -rw-r--r--  1 ropach mkpasswd 0 Apr 28 13:50 yahoo
u> chmod -w yahoo
   chmod: changing permissions of `yahoo': Permission denied

There were no problems up to the version cygwin-1.5.13-1.
The error on my machine is new for the following two versions
  cygwin-1.5.15-1
  cygwin-1.5.16-1

The output of the 'env':
 
The output of the 'cygcheck -v -s -r ':
 
Has anybody any ideas ?
 <<env.txt>>  <<cygcheck.txt>> 
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