I am using Community Builder 1.4. Looking at the installation package for this version, it uses jquery 1.5.0. However, my website currently has 2 different versions of jquery in the components/com_comprofiler/js directory - these are jquery-1.2.6 and jquery-1.5.0.
I presume the 1.2.6 has been left over from a previous install. I'd like to delete this directory but want to check first that it is not being used in any way by Community Builder.
Yes, you can delete the old one if you wish so.
CB 1.7 uses jquery-1.5.2 (as 1.6.x has unfortunately incompatibilities with jquery 1.5, its upgrade is postponed to CB 2.0).