Have tried the "reinstall twice" thing and occasionally it will work - but more often that not it doesn't - but there seems no rhyme or reason to it.
When I do a file check - Admintools displays usually the same list of files with wrong file-sizes. Checking these files on the server with ftp and the files are the "expected" size.
I have resorted to uninstalling and reistalling (4 or 5 times) and sometimes that works. Sometimes not. Its very frustrating not to be able to pin it down.
However the thing that has changed recently is that our Hosting provider had moved to using Litespeed as the PHP interface of choice. (where previously it was configured as a standard Apache module) - Was wondering if there is some incompatibility there perhaps? It seems to have sped up most of our sites and hasn't caused any other issues - But you never know.
Regards
Tony Newton