Comment 16 for bug 700912

In the case of upstream bugs, the policy is to report it upstream (to the dosbox developers) and try to fix it there, not just for Ubuntu, but for the rest of people that uses dosbox. This is, unless it's a security bug or it's of high(er) importance. Please indicate us if you have already reported it there and a link to their bugtracker.

Then, for your request of the 32-bit package, Ubuntu supports to have 32 and 64 bit versions of packages installed side by side (multiarch). You can i.e. see this answer: http://askubuntu.com/questions/29665/how-do-i-apt-get-a-32-bit-package-on-a-64-bit-installation