I've got two bugs in Ubuntu 14.04 LTS running 9.31.
1. Jack doesn't come up as the name of the executable (I've already mailed you about that). It keeps coming up as "stereo_tool".
2. I cannot use FM output and normal output at the same time. When using FM output, the audio goes through "fm_l" and "fm_r" in Jack to the right soundcard output. When enabling Normal Output, the Normal Output is sent to "fm_l" and "fm_r", instead of "out_l" and "out_r". This also works this way when only using Normal Output. So long story short: everything goes out of "fm_X" with normal output having a higher priority.
The last bug is in Stereo Tool for a long time, but since I can't use multiple instances anymore because of the first bug, there exists a priority for me to be fixed, so I can still upgrade...
To show it: this is stereo_too2 (the streaming instance, stereo_tool is used for FM. In 9.23 I could still edit tool to too2 to use multiple instances in Jack)