Caret disappeares deleting a styled char

[pora]

FCKEditor Nightly Built version:

1.) type some text 2.) use for it an inline style for example "Inline quotation" 3.) select a character inside the styled area 4.) use for it another inline style for example "Cited work" 5.) go one position left (or right) 6.) delete the character (with backspace or delete) 7.) caret disappeares (but pushing up or down comes at the first or at the last row)