This post is made at another location which uses different router and different ISP.
Edit 2012-09-12: this problem still exists...
Edit 2012-09-13: Could this be locale related, see https://groups.google.com/a/chromium.org/forum/?fromgroups=#!topic/chromium-bugs/a_jEG6skYo8
Edit 2012-09-14: D-Link 2470B does not work for me even with latest firmware. I have hardware version E1 and firmware 5.17.
Edit 2012-09-21: The problems have disappeared as suddenly they appeared. I have not made any further efforts to fix the problem, but now everything works nicely.
If I try to post something to the blog, the blog message gets mangled. The characters are copied and replaced randomly inside of the message. Like the URLs can be "http://3.blo.3.blospotblogspot.comcom/popscan_angrygrygryrds_soda". I could not find pattern for this behavior.
1) image URL gets corrupted: http://4.bp.blogspot.com/-M7iw-UjQfDI/UEy4L9IHgefDI/UEy4L9IHgeI/AAAAAAAAAPM/vLbiX9ZdfZ4/s1600/popscan_blogspot_com_angry_birds_soda_2_03.png
2) CSS style get corrupted: style="margin-gin-right: 1em;"
If the randomness occurs inside of the HTML or CSS, the post (web page) gets corrupted completely. And if the HTML gets broken, the posting will fail. And that happens for the most of the time... If I can successfully watch the page preview, the HTML is not corrupted (but the visible text may be) and I can publish the text.
With all the problems, errors and retries, writing a short text with 4 images took me 5 hours. And I had to keep the HTML extremely short; little longer text would get messed up.
Before I could post anything, I was seeing error "You have logged out from another location. Do you want to log in again?" I am pretty sure these two things are related... However, I got rid of this error by clearing the browser history and cache, first time this year! After using the Blogger for a while, the "logged out" problem reappears...
Chrome will report:
"Virhe 126 (net::ERR_SSL_BAD_RECORD_MAC_ALERT): Tuntematon virhe."
Which is in English:
"Error 126:(net::ERR_SSL_BAD_RECORD_MAC_ALERT): Unknown error."
Absolutely nothing works.
The result is exactly the same as in Chrome.
What have I done?
1) Cleared history and cache for all browsers
2) Rebooted my laptop
3) Made a complete antivirus scan
4) Replaced the antivirus software and made a new complete scan
5) Made a root-kit scan
6) Rebooted my laptop again
7) Tried different MTU values for my ADSL router
8) Rebooted my ADSL router several times
9) Spent hours looking for the solution
10) Performed factory reset and fresh setup for router
11) Tried different MTU values from 1200 up to 1500
Luckily I am not alone with my problem
The same issue is visible for other Finnish users at the moment (http://murobbs.plaza.fi/internet-tietoturva-ja-muu-tietoliikenne/926370-tp-link-mr3420-ja-google-ei-toimi-keskenaan-err_ssl_bad_record_mac_alert.html).
Also the same errors are shown in Google support forums, sadly there are no proper solutions for fixing this.
Edit 2012-09-12: It seems that routers/modems from many manufacturers have this problem, at least: TP-Link, D-Link, Buffalo, ZTE and Telewell.
Change your modem/router OR upgrade its firmware.
I have D-Link 2740B, which stopped working Friday 7th September. I found other modem from my closet and hooked it to ADSL-line; everything works.
The reason why it works, is yet unknown to me. I am beginning to think it is actually related to MTU value. But the strangest thing is, that the problem appeared suddenly on one day, and not only for me.
You can try to change the MTU value from your router/modem to 1400.
I have read that for some people this change has fixed the issue. The MTU value can be changed from the devices configuration pages, usually accessible by the web browser. See your device manual for details.
Edit 2012-09-12: For me, Google services work only like 2 minutes after MTU change.
The Blogger will function properly only for a while after changing DNS address.
Does these fixes work for you?