In 1.3.5 I can do the following to get a 3-digit number with the middle digit underlined in math mode (eg, 1_2_3)
1. Insert->Math->Inline Formula 2. Type a number 3. Insert->TeX 4. Type "underline" (without the quotes) 5. Type a number 6. Press right-arrow 7. Type a number With the current 1.4 CVS tree, step 5 above results in a pair of empty brackets underlined with the second typed number to the right, not underlined. In neither version does Ctrl-U give me underlined text in math mode. Thanks Rob