Is this another XP problem with Softice?

A program I'm testing has the following code:
00441AA5 call ds:GetWindowTextA
00441AAB cmp eax, esi

I set a bpx on 441AAB. Then I exit SI and select the 'enter password' function that brings up the dialog box in 441AA5. Before the dialog box appears, SI pops up with a break at 441AA5. Shouldn't execution stop and wait for me to enter the password? If I exit SI (after the break) then I get the dialog box, but when I press OK it doesn't break again.

I tried debugging this app with ollydbg and w32dasm and ran into the same problem.