I'm using Toad for Sql 126.96.36.199, and it seems that all of the ctrl key shortcuts for selection are broken. ctrl+shift+left (previous word), ctrl+shift+right (next word), ctrl+shift+home (to beginning of document), ctrl+shift+end (to end of document) all don't work. If memory serves, this only started happening recently. I tried re-mapping my keyboard shortcuts, no dice.
this was reported and fixed as QAT-15111 for 7.1 release. Please download the latest version.