If i create put a formula in an impress slide I am unable to resize it using the
handles on it box.

steps to reproduce:
1) create a new presentation document
2) insert -> object -> formula
3) enter a formula
4) click to get back to normal slide design mode
5) select formula, a box around it with 8 green handles is shown
6) attempt to resize the formula by dragging the box handles

if i right click on the formula and choose 'position and size' there is a
protect size tickbox. this sometimes makes the formula resizable once.

i found this issue on 2.3 on linux x86-64, and it also occurs on 2.2 on linux
powerpc. both ubuntu default versions. i have not tested other versions