[SOLVED] Wierd permission problem

[arzgi]

Debian Jessie, xfce

A few days Firefox has been unable to load any files, I've set it to save files to my Downloads directory, which permissions are 750.

chromium won't even start:

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:FILE_PERMISSION_USER_MASK. Temp directory mode is not 700: 600

vim announces something like this:

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Can not open /tmp/vaHt8mV/0

and that seems:

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drw------- 2 arto arto 4096 tammi 19 11:03 vaHt8mV

So 600, but why?

I installed debian wiping the old /. Home is on separate partition, and was not changed. Did not help.

My umask is 127.

Made a test user, and on its account no problems at all.

What is causing this?

And changing umask to 007 solved to problem. Funny thing is, that my old umask did not cause any harm at all before debian 7.8 update.