The main issue with Java is that the different platforms are available at different timelines and there are a lot of different Virtual machines out there.
The memory problems occur because the Garbage collectors are sometimes very slow in reacting, then the memory usage goes to the roof and the application hangs for several seconds.
I know an x-rated and very politically term which makes a fun about Java"s claim to run the same on every platform.
It does definely have more problems than Perl on various platforms.
I am missing any cliches on .NET/Mono in the list.

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