FindOnClick bug report

When I want to search files with different extensions like *.php, *.css and *.inc the search is not correctly executed. In the filename filter I enter "*.php *.css *.inc", but *.css files aren't searched. The explanation is in the title bar of the results window. It says

filename matches "*.php" OR "*.css *.inc" OR "*.inc"

instead of

filename matches "*.php" OR "*.css" OR "*.inc"

Of course "*.css *.inc" doesn't match any file.