My ACAD 2013 suddenly was plagued with a few fucntional issues which I suspect may somehow be related as they all started failing at the same time. There may be fixes in the upgrades but I have not been able to upgrade (the link autodesk sent me recently was immediately not valid!) and it appears that without a subscription I have zero chance of direct customer support (?) so here goes:
1) I cant do a page setup for paperspace tabs nor edit existing paperspace tabs
2) I cant edit text attributes by double clicking (have to edit in the properties box)
3) I cant edit blocks. My drawing will lockup and crash when attempting to do so
4) I cant "select color" in my Layers Dialogue box (that is, I cant introduce colors that havent already been assigned to a layer)
So a random assortment of items. Since I seem to have no other way to figure out what's going on, thought I'd give it a try