seems like you are missing some theme packages, or some theme info is damaged.
Can you perform these actions(3 commands) as root at terminal?

Ok, done it. Qt-components-base-theme is already the newest version and is set to manually installed. Done dpkg -l | grep qt-components- too. No changes in Tweetian, making a reboot now.

I mean you to post output of commands here
last one is needed for me to check if correct versions are installed

Ah ok here´s the result of last command

ii qt-components-10 1.0-pre2-1+0m5 Qt Quick components runtime libraries
ii qt-components-10-com.meego-compat 1.0-2 Compatibility package for qt-components-10
ii qt-components-10-com.nokia.meego-1.1-compat 1.0 Compatibility for com.nokia.meego 1.1 and com.nokia.extras 1.1
ii qt-components-base-theme 0.8.0-2+0m5 Themes required by Qt Components

heres my output. sorry forgot to send to log

ranslation for "en" exists
Preloading theme "base" from cache
QNetworkReplyImpl::_q_startOperation was called more than once
Error calling Twitter.getTweetActivitySummary(): 0 0
Error caliing Twitter.getConversation(): 0 0
file:///usr/lib/qt4/imports/com/nokia/meego/Button.qml:77:5: QML BorderImage: Failed to get image from provider: image://theme/meegotouch-button-navigationbar-button-inverted-background-disabled
file:///usr/lib/qt4/imports/com/nokia/meego/Button.qml:77:5: QML BorderImage: Failed to get image from provider: image://theme/meegotouch-button-navigationbar-button-inverted-background-disabled
file:///usr/lib/qt4/imports/com/nokia/meego/Button.qml:77:5: QML BorderImage: Failed to get image from provider: image://theme/meegotouch-button-navigationbar-button-inverted-background-disabled
file:///usr/lib/qt4/imports/com/nokia/meego/Button.qml:77:5: QML BorderImage: Failed to get image from provider: image://theme/meegotouch-button-navigationbar-button-inverted-background-disabled
file:///usr/lib/qt4/imports/com/nokia/meego/Button.qml:77:5: QML BorderImage: Failed to get image from provider: image://theme/meegotouch-button-navigationbar-button-inverted-background-disabled
file:///usr/lib/qt4/imports/com/nokia/meego/Button.qml:77:5: QML BorderImage: Failed to get image from provider: image://theme/meegotouch-button-navigationbar-button-inverted-background-disabled
file:///usr/lib/qt4/imports/com/nokia/meego/Button.qml:77:5: QML BorderImage: Failed to get image from provider: image://theme/meegotouch-button-navigationbar-button-inverted-background-disabled
file:///usr/lib/qt4/imports/com/nokia/meego/Button.qml:77:5: QML BorderImage: Failed to get image from provider: image://theme/meegotouch-button-navigationbar-button-inverted-background-disabled
file:///usr/lib/qt4/imports/com/nokia/meego/Button.qml:77:5: QML BorderImage: Failed to get image from provider: image://theme/meegotouch-button-navigationbar-button-inverted-background-disabled
file:///usr/lib/qt4/imports/com/nokia/meego/Button.qml:77:5: QML BorderImage: Failed to get image from provider: image://theme/meegotouch-button-navigationbar-button-inverted-background-disabled
Error: signal 11:
/opt/tweetian/bin/tweetian(_ZN16QDesktopServices15storageLocationENS _16StandardLocationE+0x1c74)[0xf008]
/lib/libc.so.6(__default_sa_restorer_v2+0x0)[0x4129c950]
[0x0]

please try to install blanco theme:
btw, do you have CSSU update installed?

Hi Custodian, today I did some tests with the debug version you kindly provided. When running in foreground with display permanently turned on tweetian is stable. I left it running for several hours. It did not crash. The refresh interval was set to 10 minutes.
When running in background tweetian crashes after a short time. I attach the Log-File. Hope it helps you to find the root cause of the problem.

heres another log.

Hello,

Installed blanco theme, no changes. Removed it and installed again but nothing. I have CSSU stable 21.2011.38-1Smaemo6.1.

remove following folders with cached info: