Hi all I have observed the following undo-bug in lyx-1.6.4 and lyx2.0svn. I consider it to be serious, as it can completely spoil a file with many mathematical formulas if you make many undos without thinking (which in fact happened to me):
* Open new file * go to math-mode with <alt>-m-m * write a symbol with one upper and one lower index by typing: M^a<space>_b<space> * then navigate with the cursor back to the beginning of the upper index, delete it with <del> and type <space> so that the upper index-structure will be removed. * Now try to undo with <Ctrl-Z> and get back your original expression M^a_b . It does not work! Best, Sebastian
