DrByte:
I'm not sure I understand which issues you're referring to.
Please don't take the comments the wrong way. I respect all the work the entire team and other volunteers who work with you to keep the code up to date, fuctional and secure. I just question my own abilities as a non-coder based upon what my eyes see/interpret in my daily readings here. I'm afraid that by the time I got my sandbox ironed out, V160 would be released requiring me to repeat the process.
V155 seems to be a more significant upgrade than the increase in version number indicates based upon the number of edits to plugins, templates, etc that are functional with V154 but not V155. Can't find it now, but I seem to remember a post by you that somewhat acknowledged that observation, so it is not just me. And the number of threads that seem to indicate edits here and there to remedy those issues. All those edits are scattered about, probably easy to find using Google, but just there shear number of threads gives an onerous appearance to my non-coder mentality.
I stopped looking at V155 when importing my V154 database into my sandbox failed. That might have been related to the sandbox having a different, lower version of PHP and MySQL than the live site but users move between servers all the time. This number of threads may not have anything to do with V155 but are related to other code that becomes broken as a result of compatability issues with V155.
https://www.zen-cart.com/showthread.php?220483-removal-of-id-stText-in-ZC155-causes-various-javascript-failures
https://www.zen-cart.com/showthread.php?220162-v1-5-5a-Configuration-Edit-Update-HTML-Entities
Ongoing thread having something to do with Admin sanitization so that one particular plugin will work.
Seems like there is a thread related to the built in responsive code bugs/edits that might not be incorporated into V155a.
Edits to the built-in responsive template and edits required to make any of Anne's responsive templates functional in V155. While all similar, edits are scattered among several support threads.