So I've been installing things on this new tablet. It got to a point I had 7 MB left.

I deleted files I no longer needed. And I was up to 30MB free.

I installed a few small things. I then cleared private data in microb to see ig it cleared for Tear, also.

I look at my mempry, and it says I have 55MB free!
Was clearing that private data -that- effective? Or what?

it depends, if you haven't cleared the private data ina a long time, and used the device often, than yes, it is affective. i clear it every week and loose 5 mb.

another thing is that the internal file system is a compressed one, and sometimes do not update its details until you give a device a reboot.

i have more then one had app manager fail on me because i have ended up below 10MB free, but after a reboot, have some 15-20 free...

Removing an image from the internal memory frees about twice its size...

The internal fs is jffs2, which is compressed, journalled and performs lazy garbage collection. So, if it runs short of space, and has enough space to do the shuffling, it will move data around to consolidate partly used regions of memory.

I don't know the specifics of the triggering process, etc., but it sounds like this and a combination of the compressed nature of the fs may have magically produced your extra space.

tmpreaper runs on each reboot and cleans out /var/tmp directory which is where the default browser stores its junk that you "open"