http://bugs.winehq.org/show_bug.cgi?id=32222
--- Comment #2 from testelor@yahoo.com 2012-11-14 01:37:58 CST --- Created attachment 42499 --> http://bugs.winehq.org/attachment.cgi?id=42499 Line too long in text/SPICE directive editor ('T' or 'S' key)
Pressing either 'S' or 'T' and filling up more than the line expects to will get you this. Normally, Ctrl+Enter resolves it, but for larger blocks of text/parameters/etc resizing is needed which is bug 32221.