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Welcome to the Opera 9.5 Beta Other Known Issues mini wiki at Wikia.

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The purpose of this temporary wiki is to supplement the rather modest list of Known Issues included in the original posts on the Opera Desktop Team Blog and create a one-stop place to look to see if "your" problem has been confirmed by anyone.

• If you're looking for a place to post what you'd like to see improved in Opera, then please use the Opera Browser Feature Wishes Wiki.

This list will by no means be complete or official, but should consist of issues that are "known" in the sense that others have confirmed them for you. Opera will likely have confirmed few of these publicly in any obvious place, but that's to be expected with the current bug reporting system. Include any bug numbers you know of for reference.

Please avoid posting issues that only you have seen; instead, post those to the blog and try to gain consensus. Please avoid posting issues that have already been noted by Opera in the latest original post on the blog (some very well may have been confirmed in comments, but few read all several hundred of them with each release).

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[edit] 9.50 Windows 9981

1. Opera can hang on the last element (or not otherwise complete page rendering) because of either content blocking or having Javascript enabled. Example threads with plenty of examples here and here.
2. Seemingly random favicons on the Personal Toolbar and bookmark menus can disappear when the sites are visited, only to reappear when you restart Opera. The cycle repeats the next time you visit those sites. It's a minor subset of bookmarks and typically the same ones repeat the problem. Thread.
3. A Youtube video, once playing, will continue to be downloaded even when you switch to a different site or even close the tab. May happen on other Flash video sites as well. Thread.
4. Flash videos can either stop playing after a few seconds, or play with no audio. This seems to happen as a result of visiting many sites, so probably will not manifest until after using Opera at least several hours. Restarting Opera will temporarily solve the problem. Thread.
5. Presence of populated urlfilter.ini (e.g. this, but it doesn't seem to matter which) all but cripples the performance of Google Maps. Workaround: disable content blocking for Google Maps.
6. Non-hotlinked URL selecting broken. Thread.
7. Blinking text on random sites, mostly forums apparently. It will not happen consistently, so providing a link would be meaningless. A video of the effect. Thread.
8. Memory leaks - In one day, Opera can reach anywhere between 400MB and 600MB+ with fewer than 20 tabs. Very little of that memory, if any, is given back by closing tabs. Update: 9903 seems to stay at 300MB or below where older builds would consistently go noticeably higher. Some still are finding leaks that send it over 500MB, however. Update2: One user reported seeing 1.2GB used.
9. GDI leaks - can reach 10K in a single day. (Problem acknowledged by Opera team here. Temporary workaround also offered until proper fix becomes implemented). Update: Have not seen this in recent builds (March forward).
10. Certain areas in Preferences still excruciatingly slow to get into, out of, or both (on well-used Opera configurations), such as Manage Site Preferences and Manage Cookies. CPU use spikes during these waits.
11. URL Index/History feature:
    1. Sometimes missing sites that can be found in the History panel. Example: https://secure.logmein.com cannot be found by typing "logmein," you must type "secure," but note that the problem is not limited to secure sites -- some recently-visited sites can be entirely missing no matter what you type. Thread.
    2. When you've set an index size limit and you've exceeded it, Opera will reduce it far more than is necessary to stay under the limit, sometimes deleting almost all of it. This typically or possibly exclusively happens when launching Opera.
12. Disk Cache:
    1. Set maximum size not consistently being obeyed.
    2. Much like the issue with URL Index, when you've exceeded your set disk cache size limit and Opera decides to trim the cache down to size (typically when launching), it'll reduce it far more than is necessary to stay under the limit, sometimes deleting almost all of it.