Blocks conditioned on some legacy path aliases broke between the fix for this bug and the final 4.4.0 release. The patches that broke this (again) were #6523 and #6543.

So, these condition paths for blocks no longer work after upgrading from 4.3.x to 4.4.0:

  1. </MyAlias> (defined as "taxonomy/page/or/5")
  2. </$>

and the workarounds are:

  1. <MyAlias>
  2. <^$>

It doesn't matter to me whether this is fixed/changed; I have a decent workaround. Posting this just so this behavior is documented.