I've run into some pet collecting problems today. I logged in early to find a rare Restless Shadeling. I found one (using the quality ID macro!), but when I got him below 35%, I couldn't trap him!!! I only had 2 in my journal, so there should've been a spot for him. I tried again on the next available Restless Shadeling, but I couldn't trap him, either. Someone else was farming for them, and they were all gone, so I left.
Later, I was farming in The Jade Forest, and I came across some of the new pets that I hadn't trapped yet - meaning there were zero in my pet Journal. When I got them below 35%, I couldn't trap them!!! I noticed that my "total pets" in my Pet Journal was 520, so I went through and released some poor and common quality duplicates, as well as caged some of the old vendor pets that were extra. When I got my total pets number below 500, I seemed to be back on track for trapping.
Is there a limit in the pet journal? Is it 500? I figured a minor update or hotfix last night could've added some previously unrecorded pets and put me over 500.