TYPO3 Core

I can confirm this issue at my running version 4.1.5

I create a folder with a dot (folder.) In the filelist the folder displayed correctly (folder.), but the inputfield in the rename formular get the folder name without a dot (folder).

If I rename the folder an press the rename button, I get this error messages:

filetype() [function.filetype]: Lstat failed for /fileadmin/folder in /typo3_src-4.1.5/t3lib/class.t3lib_extfilefunc.php on line 660

1. Time Memory Function Location
   1 0.0013 90428 {main}( ) ../tce_file.php:0
   2 0.2063 7191620 SC_tce_file->main( ) ../tce_file.php:199
   3 0.2070 7196996 t3lib_extFileFunctions->processData( ) ../tce_file.php:154
   4 0.2071 7197100 t3lib_extFileFunctions->func_rename( ) ../class.t3lib_extfilefunc.php:255
   5 0.2072 7197508 filetype ( ) ../class.t3lib_extfilefunc.php:660

1. Time Memory Function Location
   1 0.0013 90428 {main}( ) ../tce_file.php:0
   2 0.2118 7203576 SC_tce_file->finish( ) ../tce_file.php:200
   3 0.2118 7203576 t3lib_extFileFunctions->printLogErrorMessages( ) ../tce_file.php:166
   4 0.2142 7204196 template->startPage( ) ../class.t3lib_extfilefunc.php:302
   5 0.2142 7204368 header ( ) ../template.php:618

Errors:
2: Target "/fileadmin/folder" was neither a directory nor a file!

Duplicate of bug #17121