and that my capture templates that were pasting TODO entries in that file were starting to exhibit 

strange behavior. Mostly just getting stuck at a mysterious "clipboard pasted to level 2 subtree" 

message, then it would just hang there until I hit ctrl g.

Since this file was getting quite big and unwieldy, > 5000 lines, I decided to split it up, so that 

the various entries under their headers would be split up into different files. I basically just 

put each header into its own separate file, and updated my org-capture-templates accordingly.

Since then, no strange behavior, no stalling and hanging for no apparent reason.

So, I was wondering if there is hardcoded somewhere in org some kind of size limit to the 

files it has to deal with, or is this some limitation arising naturally from the size of 

the clipboard? I'm not sure how org handles large files when considering how to paste 

entries from capture templates.