For some reason, all of the sudden, when I type "I" to insert a block, autocad defaults to running -INSERT instead of INSERT.  Even the autocomplete for "I" is different, it shows just:
 
I
 
rather than
 
I (INSERT)
 
Typing "INSERT" fully at command yields the window just fine, but "I" only yields command line options.
 
I have confirmed wtih my ACAD.PGP file, and there is no other definition for the alias "I" in there other than the one for "INSERT".
 
The only thing to have changed recently to my autocad settings is adding some company .LSP files.  I have since removed those but the problem persists.
 
The applied for the alias "EX" for EXTEND.  It now defaults to EXPLODE and behaves the same way as noted above at command line autocomplete, not showing the associated command in brackets.  Again, all is correct in the PGP file with no user defined aliases.
 
ATTDIA is set to 1.
 
Any help to restore these commands would be wonderful, otherwise I am going to be tripping over this constantly with home vs. work.
 
-ToddNocturnalP2011-11-10 21:03:35

How do you access and edit your pgp file?  I'm wondering if you are looking at the right one.

Try to copy acad.pgp file from some other computer where it works fine and paste it in yours. You can find it in \UserDataCache\Support folder inside the installed autocad folder.
 
It seems that your file has been corrupted somehow and if you face same problem even after doing that, you would have to repair/reinstall your software.

Alright!  Solved the problem late Thursday.
 
Through learning some LISP , I was able to understand what was happening inside one of my .LSP files being loaded.  The aliases were being re assigned in that file for some reason.  Not sure, old LSP routines that were continued to be used from who knows when without being updated.  Removed those alias assignments and everything is back to normal.
 
I also tried to remove these .LSP files from being loaded by removing them in the CUI... but even though they were no longer being indicated to be loaded there, they are still being loaded.  Any ideas on this one?
 
For the record, I had tried editing the .PGP file through notepad as well as through ALIASEDIT.  All other CAD computers in the office acted the same way mine was due to the .LSP alias reassignment.
 
So, if anyone has any information on where to look for .LSP files being loaded, even though they are no longer indicated in the CUI, please let me know!
 
Thanks again!
 
-Todd