SMB_COM_DETELE fails with Access Denied if it immediately follows a 
TRANS2_SET_FILE_INFORMATION with attributes 0x0000 that *does not specify 0x80 
ATTR_NORMAL*. NT 4.0 does not have a problem with ATTR_NORMAL on or off. The 
below is a summary capture of jCIFS recursively deleting files and directries, 
then removing read-only with a TRANS2_SET_FILE_INFORMATION, and finally failing 
to delete the file even though the TRANS2_SET_FILE_INFORMATION was successfull 
in removing read-only.

SMB      Transaction2 Response FIND_NEXT2, Files: sf.o tables.o telnet.o 
toggles.o trace_ds.o util.o xio.o XtGlue.o c3270 version.o x3270if.o
SMB      Transaction2 Request FIND_NEXT2, Continue: x3270if.o
SMB      Transaction2 Response FIND_NEXT2, Files: x3270if 
SMB      Find Close2 Request 
SMB      Find Close2 Response
SMB      NT Create AndX Request, Path: \test1\c3270-3.2\XtGlue.c
SMB      NT Create AndX Response, FID: 0x1c6b
SMB      Transaction2 Request SET_FILE_INFORMATION, FID: 0x1c6b
SMB      Transaction2 Response SET_FILE_INFORMATION
SMB      Close Request, FID: 0x1c6b
SMB      Close Response
SMB      Delete Request, Path: \test1\c3270-3.2\XtGlue.c
SMB      Delete Response, Error: Access denied

This also occurs in 2.2.7.