The prospect of lower than expected US interest rates made risky assets more attractive and also caused some selling of the dollar whose strength weighed on financial assets in emerging markets last year.
The forint hit its strongest levels since May last year at 315.03 against the euro in overnight international trade.
The forint retreated to 315.85 by 0919 GMT as the euro gave up ground against the dollar, still slightly firmer from Tuesday's domestic close before the Fed's comments.
The zloty touched a 5-week high at 4.2788 against the euro, before retreating to 4.2804, still up by 0.2 percent.
The leu drifted further away from record lows hit last week in response to worries over the government's new tax on banks. It traded at 4.738, up a quarter of a percent.
"There has been a bit of panic over the past days and now it
seems that some foreign players have begun ... to throw back some euros into the market ... but nobody can estimate how long will it last," said a dealer with a foreign bank in Bucharest.
Another trader said trading volumes were "pretty large".
The Czech crown jumped in early trade from a one-month low set on Tuesday, but soon gave up most of its gain, to trade at 25.777.
Czech central bank Governor Jiri Rusnok said on Czech television late on Wednesday that the bank could deliver between zero and two interest rate hikes this year.
One Prague-based dealer said the crown was choppy because the latest comments from Czech central bankers left the market unsure about the rate hikes priced in earlier.
"At the beginning of the year it was sure (of a rate hike)," the dealer said. "Now it is different. Nobody on the market is 100 percent persuaded of what will happen."
In the region's equity markets, Bucharest led a rise, with its bluechip index gaining 0.7 percent.
Poland's 10-year government bond yield dropped 4 basis points to below 2.73 percent, near 2-and-1/2-year high territory below 2.707 percent.
Hungary's 10-year yield dropped 9 basis points from Wednesday's fixing to 2.75 percent, and traders projected that Thursday's Hungarian government bond auctions would draw strong demand.
"The international environment helps bonds," one Budapest-based trader said.
"The Hungarian central bank's envisaged tightening means it would fight inflation ... This is a win-win situation for long-term bonds," the trader added.