Great suggestion! This is something I have been considering for a while, an approximate or fuzzy search feature. Once we get a handle on the outstanding bugs, it would be a nice feature to tackle. Since we consider non-contiguous letters in words for tagging, it might conflict with the existing full-text search. We might need to introduce a new mode unless we can figure out how to assign tags to sites while allowing for collision-free expansion of non-adjacent but sequential search characters. It might be possible, but would probably reduce the number of available two-character tags.

Doesn't it just mean searching for upper/lowercase (or vice versa) 2-character sequences ?

If all you want is the ability to search for lower and upper case letters, then it currently supported in AceJump 3.5.1. If you want to search for hump characters (camelCaseSearch -> ccs) a la IntelliJ IDEA's camel case completion, then this is not yet supported.

Actually, I'd like to see this plugin know my Editor (General-)Setting "CamelHumps" and only select the camelHump substring when in Target Mode (the mode in which a word is selected after the jump)... if "CamelHumps" is checked in my settings

Basically setting 1st parameter in call to addWordSelection to true

I was expecting the PR to be longer, but it's just as long as it needs to be! I wasn't aware of this CamelHumps setting, thanks for spotting.