Although there is a "UI limit", it's necessary to have the hard limit on the property too. I noticed this bug first hand just now, when, after accidentally setting the size to 8188 (due to a combination of typos and sluggish UI refresh) my machine locked up completely when trying to jump to that frame. It got so bad that I had to do a hard reset to fix it - so, it's possible that even 1000 or 2000 as used now are actually way too large still.